[How to remove tweeter RF-7 II]

I just tried it by pulling at the outer ring and it wend off. I could inspect the tweeter mounting. and It was still properly mounted (2 screws only).

[How to remove tweeter RF-7 II]

Does somebody know how I can reach the mounting screws of the tweeter. I propably first have to remove a kind of cover, but I dont know where to pull. I dont want to break it ofcourse.

It looks like there is a small gap between the tweeter and the front panel. Now I am afraid that it is not air thight anymore. I know I carried sometimes the speakers by holding the tweeter.

Thank you,

Paul