I haven’t seen a fridge like that in a long time. Some of the gear I don’t really recognize, but I’ll give you the basics.
it should all plug into the power conditioner (top) so you can power on and off with one switch. It’s also a surge protector, vital in shithole club environments with questionable wiring.
The tuner should probably go first, followed by the Hush. Then you put your amps in there. If they have effects loops, you go to the multi-effect units, then the delays followed by reverbs. Might want the BBE units after the multi effect units but you can try before and see if you like that better.
is there a big foot pedal to control it via midi and such? If not, you really kinda need one.