Wiring a toggle switch for coil tap

My HH guitar currently has a 5 way switch with a toggle for 10 combinations (And 2 pots). I want to replace the switch with a 3-way and use the toggle as a basic coil split switch that controls the split for both pickups. So it’d be bridge-both-neck and then a coil split version of those three.

If I could I’d just remove the two way toggle entirely for a basic HH setup, but I can’t do that without leaving a hole in the guitar so this is an okay option too.

I can’t find a schematic to copy so how can I go about wiring this up? I’ve rewired guitars before and built pedals according to schematics so I’m good with a soldering iron, but I can’t figure out how to wire this.