I think I figured this out, I had to replace the holder for one of the turnsignal bulbs this weekend since the PO glued in the bulbs rather than replace the worn bulb holders...
Anyways there is 3 wires: blue, black + brown. On the turnsignals the brown wire is cut and on the park/pos the blue wire is cut so connecting them again should make it work like on US trucks. Once I get the other 3 holders I'll probably connect them again and put in switchbacks.
Hmm, alright. But connecting them where? Just connect them back on the bulb holders?