So amp out, take off glove box completely ( not like me who leant on it whilst dangling and snapped a hinge)
I took off the bottom side plastic plate, covering fuse box, screwed on at back and clips down door frame side
nut at top of amp holding bracket and one under glove box area holding other bracket 10mm hex. then top and bottom brackets have 2 screws each, 8mm (hex) and then both are zip tied to a thick wire loom.
it is clearly mounted before anything else goes in so doesn’t have a natural out but got it out through the bottom carefully as there are a lot of wires that are tightly mounted,
wish id taken more photos, but failed, shredded knuckles, and only photos are end cables and back of amp, the brackets were difficult to remove as at best was a quarter turn at a time and the top one has raised curved sides
now to find the bypass cable
EDIT, amplified bypass PC2-92-4, non amplified PC2-93-4