...so based on realoem, and TIS, the wires you have in your picture do not belong to the "start/stop" button based on the following:
- The start button wiring should ALL be 0.35mm wires, and you have a red and brown wire that are larger gauge wires
- The start button does not use a CAN bus wire pair, and your picture has the twisted CAN bus wire pair in it
- None of your wire colors in your picture match those required for the Start/Stop button wiring loom (pre-LCI, nor LCI)
Regardless, I have provided both the pre-LCI (w/o automatic) button and LCI START/STOP (w/ automatic) button wiring diagrams below which is wired directly to your CAS module.
A quick way to verify all of this, is to locate your CAS module, and verify on the CAS Connector A16*2B, that the wires from pins 6, 8, 5, 21, 7, 18, 9 and 22 are matched to the wires in your picture....I suspect they don't.
I've added a picture of the CAS location in your F01 and it's corresponding connector assignment.