Correct no starter wire from switch. The foot stomp is the switch for starter
On position on switch to everything else you need power, ign coil, and other relays.
ACC most people wire everything but the coil and some other items. most modern harnesses have this all figured out with a relay to on and another relay for ACC and it handle sit in the fuse box.
Get the instructions for the one in the truck to help with that correct setup.