Prewired Guitar Harness Kit 1 Volume 1 Tone 1 3 Way Blade Switch for 2 Humbucker | eBay
EDIT - need a verified and surefire wiring diagram - 2 humbuckers, 2 vol, 1 tone, coil split, toggle | The Gear Page
Stratocaster Wiring Harness for 2 Humbuckers – 2 Volumes, 1 Tone, 3-Way Switching – OD Cap | Hoagland Custom
I'm going to be wiring two humbuckers with a master volume, 3 way switch, and coil split switch. This is the closest diagram I can find, except it uses a push/pull tone
Kmise MI0318 Guitar Wiring Harness 2 Volume 1 Tone Potentiometers 500K 3 Way Toggle Switch Chrome : Amazon.in: Musical Instruments
IronGear Pickups - Wiring
CRAIG'S GIUTAR TECH RESOURCE - Wiring Diagrams
3-way Toggle Switch + 500k Pots + Wiring Harness for LP 2 Humbucker Guitar with 3 Colors - AliExpress
How To Wire: 1 Volume, 1 Tone, 3 Way Toggle Switch - YouTube