on the switch wiring, i would find out what the other wires are for as you may have to join some and connect them to the same terminal to make the whole thing work. If you know what year the switch was originally for then the wiring diagrams are free on "the samba" and you should be able to work out from there.
Be sure to post your findings to help others in future, the genuine switches are getting thin on the ground now. I paid £130 last year for one second hand.
dave