New horn, how about wiring?

  1. #1
    Hi.

    I have bought a Ford A horn, and wants to have an extra button for it, but my question is, how hard is it to get a wire from out front and into the cabin?

    I can't seem to find any sorta holes or ways to get it trhu..
    Its an Mk1..

    Anyone who can explain to me where or how I do this, as easy as possible?

    Thanks