I've had a ton of ex police cars and never had a problem hooking up the rear doors so they open from the inside. I just bought a 2008 Impala straight from the auction, and I can't figure out how to hook the rear doors up to open from the inside. Apparantly there's a cable now that runs from the inside door handle to the latch. That cable is hooked up, and the child safety lock is disabled. What is the secret to getting them to work? Thanks.