One of my rear seat belt buckles is broken, the red button is sticking out of the top, I see no visible way to remove it, how do I fix it?

Also, am I missing something obvious? The middle seat looks like it is about 6 inches wide, who designed that thing? How is anyone supposed to sit there? Or is it just an extra buckle for really big passengers or car seats or something? Lol It is the middle one that is broken FYI.

Also, what bit do I need to unscrew the front belt hanger? The driver’s seat belt is all twisted and I need to take the hanger off so I can untwist it, but I don’t recognize the head of that bolt.

 

On mine, the seat belts are all torx bits. Can't remember the size, but they're fairly large

 

I got 18mm bolts on mine... I think they are 18 anyways... only 2 tors bolts, and that's one on each front seat, very odd but hey... and I'm in the same boat for the middle seat, way too small for anyone