[66sprint6]

I received my rear speaker from our host and would like to add it to the AM/FM radio that came in the car. The radio works perfectly and even the front speaker sounds good. We got a rear speaker switch from a member here (thanks) and are inquiring as to how much work it is to install, in a car that never had one.
One important factor is that ours is an AC car. I was spoiled working under the dash of our non-air Tempest, but this AC thing is a whole different ball game.
AC aside, what has to be done to accomodate the switch? I'm thinking that, at least for now, I would just run a wire directly back to the speaker if it's too much work.