Please could someone answer another heavy building question.

I’m after some general advice having just procured a working electric wheel chair. I’m about to begin sketching out the wiring etc. for a heavy. Aside from the receiver, batteries, ESC, LED and a beefy link in there is there anything else that needs to be in there that the featherweight stuff doesn’t require? Do you heavyweight peeps have anything else mandatory that you find really helps? Do people use specific fail safes or any other electrics that I haven’t thought of? I will ask questions as I need to, but just wanted to check lol.