All i know is that some of these cables come of easy, and others only with quite a bit of work. Most (if not all?) have a "tab" that must be pressed to release them, some times you have to press some tabs much more than others.
EDIT:
--I just noticed that you dont have auto climate control on your car, so that might be the reason that few people recognize your blue cable, cuz most of us have the auto HVAC system. --
Jazzy, will the mod even work on thr 1CD HU?