It's actually the rail over the sound bar, so not that far back, i think its the 2nd or 3rd bow/railis that the back rail? if so, the window slides out of the rail, then just slide it back in, check the opening on the rail first to see if it is open to far, that has never happened on mine, but the side window one time was being a pita and kept lining up wrong and would pull out of the channel, but that may have been me just getting used to the new top, hasn't happened since