The mirror caps are mounted using few tabs. To remove you will have to simply pry the cap gently up and outward. It will come out with some pressure.
You should use a plastic pry tool for this.
Which will reduce the risk of damaging any surrounding area.
I have attached diagrams for your reference.
Please let me know of any questions.
Image (Click to make bigger)
Tuesday, August 24th, 2021 AT 9:50 AM