Bluebasser that's kind of the problem, I just bought this troller for my trihull not expecting to be getting a bigger better boat. It's a foot controlled minn kota edge. I'd rather not lose out on the money spent on the new TM, plus have to get the funds for a new 24v motor. I know it's not ideal but im not a hardcore fisherman anyways, so at least for now, I'd like to just use what I have. Save up for the right one and then sell this one.
The main issue I'm having is how to wire the minn kota to the existing Ranger style 4 pin plug. I have found out plenty of ways to wire it for 24V, but none for 12. Can I just wire them in parallel as you suggested and only use 2 of the inputs at the TM plug, effectively making a 2 prong plug?