Melex 252 Wiring Conern

[loomisfarmer]

Just purchased a Melex 252 Serial#171482. Based on that number, I'm assuming it's anywhere from a 1986 to 1994?? Anyway, when you put it either in forward or reverse, it moves (without pressing the gas pedel). I'm thinking that should not be happening and I'm guessing we have a mis-wiring problem? Also, because there's no longer a key, someone installed a toggle switch that does nothing, so that must also be mis-wired.
Other than those issues, the cart runs fine.
My biggest concern is the moving without the gas pedal being pressed. That also creats an issue when charging because if the F/R lever gets bumped, we get full power to the unit and the coil gets RED, RED hot.
Any thoughts how you would approach these issues? (I thought I would reach out to some knowledge players before I jumped into this thing)
Thank you for your support.