I am almost, but not quite done with all my wiring and rigging. I was working on the final iteration of version 1.0 this fall but my wife very unexpectedly passed away the week before Thanksgiving and the kayak fell to the back burner. I think this is my first post since then... The kayak is currently stored in an enclosed trailer and I'll pull it out a tick later this winter and finish it up for some mental therapy. Then I will get out to fish as much as I can for additional mental therapy.
So I did NOT keep it simple. My approach is this is as close to a bass boat as I'm going to get so I threw everything at my PA14.
In nitpicky details - I used Ancor Marine Grade wiring (all tinned copper) for everything and have a mix of custom wiring and some yak power stuff as well. Also used tinned copper ends/lugs and soldered and double wall heat shrink wrapped everything. All exposed metal contacts (battery terminals, fuse block terminals, etc..) have a health coating of silicon grease. As part of the rigging, I picked up several useful tools, among which were a Weller soldering station for the soldering (goodness, with a decent soldering iron I can actually solder stuff) and a torch for soldering the larger 6ga lugs. Also picked up a hydraulic crimper to crimp those 6ga lugs. I used 6awg for the leads off the batteries to the motor and fuse block and 14awg for the rest of the electronics.
I have 3 Ionic batteries in my setup. 50ah under the deck under the seat to power the Lowrance HDS Pro 10", transducer, Point1 heading deal, NMEA network (auto navigation with the Xi3 hooked up to the HDS Pro is pretty darn cool), 2 power ports (phone charging, GoPro cameras), lights, and other random electronic stuff I'm probably forgetting. 30ah under the deck to the right (to offset weight of HDS Pro hanging off left side rail) dedicated solely to the Forward Facing Sonar. And finally a 125ah in battery box that I take on and off to power the Xi3 trolling motor. All batteries have an on/off rotary switch close to the battery as well as an appropriate sized inline fuse. The run for the trolling motor also has a 60a breaker inline and I still need to put in a relay with a kill switch/key.
I have a fuse block mounted on the mounting plate (inside the hull, up front, right behind the front hatch removable cargo bin). I need to look and jog my memory what is run through the fuse block. I believe it is the NMEA and main power for the head unit. I also have the Yak Power 8 circuit switch deal which I use for the usb power ports, the power trigger for the head unit and FFS unit, and lights. This switching unit is powered off the fuse block as well. I did pick up an assortment of SAE connectors and soldered them to device wires using tinned copper barrel connectors and covered those connections with double walled marine heat shrink.
To keep cabling neat, I used a variety of sizes of PET expandable braided sleeving. Keep in mind this usually expands up to 2-3x it's 'measured size'. For example, if you're sliding it over a bundle of wires that is about 1/2" in diameter total, use 3/8" PET and it'll keep the wires nice and snugged together. This is the same stuff a lot of rod sleeves are made from. In my opinion, I like it better when it fits snug over the wires.
On the overthinking and ultimately most likely unnecessary front, prior to the PET braid, I also ran most all of the wiring bundles through tinned copper mesh braid to which I soldered grounding wires and ran them back to the ground terminal of associated batteries. So wires/cables are covered first with tinned copper mesh braid, then plastic PET on the outside. . My goal was to eliminate electrical interference and whatnot with the sonar units. I did this over both the transducer cables, and all the power wires I ran. That said, those on this forum who know more about it than I do pointed out this was very likely completely unnecessary.