Trolling motor plug

[TX-Deluxe]

12/24 battery system on a Motorguide trolling motor. 

 

I need to get a new charger. I need this female plug to charge the batteries.

 

How would you wire it to the charger. 

Charger has a red and black. The plug has 3 wires?

 

http://www.explosivepowersports.com/attwood-troll-motor-plug-3-wire-10ga-1-7647-7/?gclid=Cj0KCQjw_ODWBRCTARIsAE2_EvV0igTV099Hzsi-EWoHFc5hEqGe9dXW6w3jdJ8I62D0mR9VgabeZ8MaAgxTEALw_wcB

 

 

[th365thli]

Confused. Why are you wiring a plug to the charger? Your charger for the batteries should have leads that go directly on the batteries

[TX-Deluxe]

Boat is 20 years old . It has the bow mounted charging port. Same port you use to connect trolling motor to. It has a "charge switch "used to just plug in my charger to the port. 

I guess I could update it to a newer style charger