How to wire Alps pot to Alpha 3 position rotary switch

Newbie here, hope this is the right place to post my question. How do I wire a Alps RK27 10K potentiometer to a Alpha 4 pole 12 throw 3 position rotary switch. I want to wire two stereo input sources with one stereo output. Typical unbalanced RCA plugs to make passive preamp. Diagrams, schematics and pictures are very helpful and appreciated.

Thanks in advance.