Might want to try in noob questions thread.
If you search the web for vesc documentation you’ll find the official walkthroughs of vesc tool. You seem to be on the right path maybe just a bit more docs would help you.
Do you have a CAN bus cable connecting your focboxes? I’m going to assume that’s how your raptor was setup. and that to have one controller control both focboxes you need to enable multiple vescs over can. for that to work you need:
in addition the CAN ids in app general page should be different. ( usually primary set to the lower number 0 and secondary set to 1 )