TAE is more than likely correct.
The System up to the plug is probably two sets of 12V from the batteries making four pins and the change to 24v is in the switch or trolling motor where is puts the batteries in series. The Charger Cable would have the negatives jumpered and the positives jumpered separately putting them in parallel at 12v each. Let us know if that plug is four pins.
G.
Standing in the Gap
Will do, but it only has 3 prongs.....will get more into it when I find a plug.
Looking to make life a lot simpler if this does work out and will post the findings......maybe by asking for donations for a new wireing system HA
Dusty
A gun in hand is a lot better than a cop on the phone.