It is the front one right ???....I would say try and pull harder that didn't happened when I took mine off. However what I did noticed is that those connector have a lot of pressure eithe when collapse or extended, because I didn't tighten mine all the way and they were playing a little and opening and closing the door was sort if a B@t"!? Best advice would to keep trying and pulling them out....sorry I can't really help out more.
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