Aceskoda42

Hello all, sorry for reopening an old tred, I currently installing heated seats into a mk2 superb and I found this tred when searching for wiring diagrams. Hopefully some can help me ; On the above diagrams there is a green/black and green/ blue wire connecting the control unit to the switches , these are .5 gauge wires . There shown to be linked with a heaver 1.5 gauge wire of matching colours, these wires come from the thermal control within the seat. Are they simply joined together with connectors at points B431 and B 645? I'm concerned to join because of the considerable wire gauge difference. Cheers