C5 wiring diagram.....info for xsara cruise control!

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Does anyone have a xsara wiring diagram? Am trying to find out where the wires from the red brake pedal switch (for cruise control) go to?

Am trying to retrofit it to my '02 xsara, is enabled on lexia but can't find second (red) brake switch.....cause it's not there! I only have the white switch with 2 wire output, and no other wiring! So what i want to try is to make my own loom for the missing red switch.....just need to know where it goes to in fuse box, or wherever!