Re: Wiring diagram request
I think the Schecter pairs the lugs in sequence. But if you can read a diagram enough to wire and troubleshoot a guitar, you should be able to work out what the lug positions are and which lugs are common.
So for a standard Fender CRL type the lugs are a pattern like this (I’m showing 1 is the bridge and 5 is the neck)
C-1-3-5
1-3-5-C
Schecter *might* be *something like* this
C-1-1-3-3-5-5-C
...but I’m not 100% sure. If you read other Schecter diagrams, they number the lugs and you see that kind of pattern.
But all that aside, if you understand what wires are required for each position, you should be able to work out how it needs to be on any switch.
For example, to split to slug, pickup series wires (red + white) go to ground.
To split to screw coil, pickup series wires go to positive (or you can get trickier and just get the red wire to positive somehow, but that usually require a super switch, I believe).
To run pickups in series, you have to connect the ground of one pickup (green) to the hot (black) of the other, somehow. For this, ensure the bare wire is always grounded separately from the green wire of the pickup you are putting in series. (The Schecter diagram appears to be putting the bridge in series with the neck.)
Knowing all that, you should be able to work it out. You just need to know the lug pattern of a normal 5-way blade. The Schecter switch is irrelevant if you are not using it.