I've just ordered a second one of these after fitting one in my fretless Jazz. I used a Stingray scratch plate as a routing template to get both the 'sweet spot' and the right sized rout. It looks to be identical in size to a 'standard' Musician pickup, as the scratch plate is a lovely snug fit around the pickup. 
 
	 
 
	There isn't really any information on wiring it up, so I had to get my meter out to check which coil is which; not even a sheet of paper in the packet...
 
	 
 
	Wiring is as follows: 
 
	Red wire is HOT for J coil
 
	Thick Black wire is GROUND for J coil
 
	Thin Black wire is HOT for MM coil
 
	White wire is GROUND for MM Coil.