PRS David Grisson style wiring for a two humbucker Strat

I came up with an idea for an unfinished Strat project I've had stashed away but can't find a wiring diagram. If anyone is familiar with the PRS David Grissom Tremolo McCarty, it has two humbuckers wired with each having its own volume control and a master tone that has a pull-up switch that splits the coils on both pickups. the switch has a resister going to ground (A little higher value for the bridge pickup) that allow the split off coil to be partially still in the circuit to reduce the volume difference between the split and non-split positions. I have a handle on that.

My question is about wiring the switch. The DGT wiring uses a Gibson style 3-way toggle switch. Strats, of course, use a blade type switch. How would I duplicate the toggle switch wiring using a 3-way CRL-type blade switch? I can't find a diagram that shows which contact on the blade equals what contact on the toggle.

Thanks in advance to anyone who can help.