67 Barracuda Dash harness install

they sent the entirely wrong tool. I have something else coming. So basically I have to take the cables off of the heater control levers? ( the slide switches) to get the instrument cluster and bezel out? Then I'm assuming the heater controls are mounted from behind where I cannot get to them? Haven't had much chance to go out there today again.. more rain, go figure it'll be nice when the work week starts...lol