so take your cell phone and record the hold downs as you remove it.
The routing is a bit odd and tight in places for the few I have pulled.
I would start with the bulkhead connector and work my way back. Start in the engine compartment and pull those on that side.
the whole box comes out from the passenger compartment side and then you have to start finding where it is held down from there.

Unfortunatly the underdash is going to go to a lot of things, vs the engine side one that has only a few items per plug.