From what I was told, the R34 wires wont reach, but there is no reason why you cant just cut and solder a longer piece of wire to it.
That strut bar bolt (if its the same as the R33 one, which I cant see why it isnt) is just a normal 14mm bolt. Get a ratchet, 14mm socket, give it a wack with your hand to get it started, take it off, ground the wire, tighten the bolt up again, and its all done!!