With the Crawlers they're asymmetrical. So one coil is hotter than the other and on BKPs it's always the screw coil that's the hot one, so at least on the bridge I'd put it so the screws are by the bridge or you may get a muddy tone, the strings move less but sound brighter closer to the bridge so the hot coil helps bring out the harmonics and high end.
I'm not sure on the JP wiring, it may b best to PM Tim for any specific advice!