36 volt is just 3 batteries wired in series instead of 2 for 24 volt...if your existing tm has a 12/24 volt selector switch you will have 2 + and 1 - from batteries just figure out which hot is on same battery as the - and remove that wire from battery and secure. I would also check and see if you have a circuit breaker inline, you might have to change it with a higher rated one.
My boat is a bass boat to... I have a 4 rod T bar setup on each back corner of the deck, they are turned just enough to allow the battery compartment lid to miss them. also have a 2 rod t bar setup on each side inline with seat...
Three can keep a secret................If two of them are dead! (Benjamin Franklin)