Did this last year on my B32 (2003). Put a repeater beside the hatch, problem is no access to mount the ST60 nuts so decided to stick the instrument onto the bulkhead with Sealant. Fed the wires up from the engine compartment ok, found plenty of gap behind the bulkhead. Did have a problem getting correct size hole cutter, found it on eBay . Sorry I do not have a pic PM me for more info.