Assuming you want an up/down switch position, with down being bridge and up being neck, then you'd wire it like this:
With the pickup ground wires going to the back of the volume or tone pot. DPDT on-on-on switches come in two types, but it doesn't matter which one you have for this application. Just strip the pickup signal wires and the wire to the volume pot back enough so that you can solder across both sets of terminals. Otherwise everything else will be standard Tele wiring.
Obviously you'll need to get a blank control plate so you can drill the holes yourself in the positions you want. You may want to consider a 'volume, switch, tone' arrangement for best control accessibility rather than the standard 'switch, volume, tone' arrangement.
Note: wire colours used above are just for clarity and are not meant to be the actual pickup wire colours.
Last edited by Simon Barden; 12-02-2020 at 04:28 PM.