The snap click on the red wire on my unit was difficult to remove from it's slot. Pulling on the wire whilst depressing the clip was a task. I believe that the connector was unusually snug which made depressing the keeper while pulling work against me. I suggest pushing the wire in slightly before depressing the clip allowing the keeper to clear for removal. Insert red wire in open slot oriented correctly for clip and then return to previous pins. Easy peasy (kinda)
