Hello, does anyone know how to remove these front belts?
Thank you!

 

I think you need a thin tool like the blade in a swiss army knife to open the cover (where you can see the lines on each side of KANGOL).
then you lift the cover and you can see a 9/16" bolt.

looks similar to a Series 3 XJ seat belt.

 

Probably you are right, but I'm afraid of breaking the plastic because I tried and it didn't move, I'll try again thanks!!

 

yes, the cover is very delicate, it opens like a door in reverse but it stays on the plastic housing, only one side releases from the housing, either the front or the rear. Use a thin blade to find the side that unsnaps.
The bolt should be at the rear but it looks like those belts were adapted to the car at a later time, so who knows.

 

This is how it came off! thanks for the tips!

 

well that is interesting! so the bolt is behind that round hole?

 

Yes right there!