Heat Problems

[OleTimer]

I have a 97 CC DS which I have tricked out a bit.
Jakes lift kit with big tires
PlumQuick motor
Altrax 500 amp controller
2 ga Cables
HD Solenoid
HD forward/reverse switch

I have heat problems. 1st problem is the battery. The battery on the far right side gets too hot. The terminals get so hot the terminals unsoldered themselves twice (2 replacement batteries). The new #2 cables on the other batteries stay cool and and the far right on the inboard side still gets hot.

The next problem is the forward/reverse switch, The stock switch got hot, so I replaced it with a heavy duty one. 2 months later the new switch melted. I got a new one. It gets pretty hot too.

I am 60+ years old. My wife and I just drive it around the neighborhood and it is flat (no hills). The cart doesn't get much abuse.

Any thoughts on what may be causing these heat problems?

TIA

Woody