Re: Calling all Japanese P90 Experts... Ever Seen This?
The previous owner (or someone) did that. It is not a design of any pickup manufacturer.
A lot of manufacturers have come up with designs for "quick change" wiring...most of the plugs are smaller and more elegant than an RCA. And that design would only work for one-conductor pickups. If you have a four-wire pickup, you'd need two RCAs plus the ground wire. Most pickup cavities would not have enough room for such a setup. GFS make a "Kwilplug" that is small, attaches right on the back of the pickup, and it works for four-wire pickups so you can still split, parallel, oop, etc.