Under dash

Here's some interesting duct tape wiring that goes to ??? and what the heck is the switch that's connected to the upper gas pedal? It would only come on at full throttle.

Heres a knob that turns like a rheostat but seems to do nothing. Looks stock.

**update on this... This is a ceramic rheostat for the dash panel and guage
lights. It's so archaic, I think Edison made it***

Fusebox? Wee don need no stinkin fuse box!

The fuse holders in the wiring harness ARE the fusebox.
Here is the reason for the push button starter. The power wire to the switch is toast. Another is cut. I need a wiring diagram.