Schematic for Wharfedale TCT 50 footswitch

[foolproof]

Hi, I acquired a Wharfedale TCT 50 C but the footswitch is missing. I can probably manage to build one myself, but would be very pleased if anyone can help met with the wiring for the footswitch. Through this forum I found the diagram of the TCT 100, which is the same generally and it shows the switching circuit but not the footswitch. A picture of the inside could probably also help a lot.
Albion TCT 50 is exactly the same amp.