reattaching gutter/door chrome trim

[yngtmr]

When i got my e30 i noticed that the chrome that attaches to the gutter had popped off slightly near my passenger mirror. Any ideas on how i can get it back on? i can't figure it out for the life of me. included are some photos of the issue for reference, thanks!

[IceWhite]

Check this thread A-pillar chrome trim coming loose

[Old city bimmer]

clip pop off. you can see it at the rust marks