Electrical regarding switch pro and Load Disconnect

Any electricians out there?

This is a dumb question and I know the answer, but I'm lazy. I have a switch pro (location:engine bay) that's already wired up to run which connects to a load disconnect(Loc:engine bay). Now I have a Switch on/off, 120, 2 Usb, ports in the rear cabin. Can I run just the positive wire and just attach the ground wire lets say to bare metal in the back?

I'm lazy because I already ran the positive wire first and I don't want to run the ground all the way back to the switch pro. (electrical didn't have correct gauge black wire at the time).

 

Yes, as long as it’s a solid (good) chassis ground. Keep in mind that your ground wire should be the same gage (size) as the power wire.