Does anyone know how to remove the bowden cable and other bits and pieces off the back of the old school manual heater controls in an e36?

I have this unit in mine:
http://realoem.com/bmw/showparts.do?model=BE52&mospid=47425&btnr=64_0155& hg=64&fg=20
And have a replacement unit as none of the original unit lights up. Tried replacing the bulbs and the plexiglass inside the unit that allows the light to flow/travel around the dials but the original still doesn't work so need to change it out completely just can't figure out how to remove the wires without anything breaking, or the bowden!!

Searched for DIY vids on youtube and it seems to just bring up manual climate control units or full OBD units.