50/60 htz switch on model 1 ?

Hello first,

does anybody knows howto make a switch for a model one Saturn ?the one with two flashing led on top of the saturn, a green and a red one, and oval button.

When I try to link the two pole of Jp1, I only get flashing lines (in diagonal) on my screen.

I succefully perform a switch on my model two (with round button) by connecting pin 79 line to +5v, and cutting the way to Jp1.

But HOW can i build a switch on my first saturn ? because Her ability to easily swap is very interesting...

thanks in advance.