Dual footswitch wiring

[Nuts]

Hi,
I bought a Marshall JCM 900 4100, and I wnat to build a footswitch, but I dont know how to wire the switches.
here's the switching circuit in the amp:

can you help me please ?
Thanks,
Nuts.

[iaresee]

Image of the switch is from Dano at Beavis Audio. He has the gift for beautiful icons.

[Nuts]

Thank you