Normally you could assume that, but with a 88 model boat, and assuming youre not the original owner and how many previous owners there could be, I would agree with Basscat and tell you to take it someone, pay the $$$$s for an hours worth of diagnostics time to get it connected right. If youll go ahead and mount the batteries so the tech just has to connect them, it will save time.JohnJones Trolling Motor Services870 773 3474Motorguide/MinnKota/PowerPole/Lowrance/Humminbird