I'm attempting to remove the bench factory installed bench seat in a 1994 R70 Ranger. I was able to release the bottom by pulling out on the bottom edge of the seat in two places and disengaging it from two metal tabs that fit into slots in the seat frame. The bottom and the back of the seat seem to be in one piece, but I cannot figure out how to release the back. When I pick up on the seat bottom from the front bottom edge it seems to want to swing up but the back doesn't release. ANy ideas on how the back is held in?