How to open 4430 filter

[Madien3388]

Hello JBL fans,
I need your help to open the filter of my 4430 (I would like to open it as seen in the picture 1). I've managed to remove it from the speaker but I'm afraid to unscrew the bottom screw from the "external/internal crossover" switch (as seen on the picture 2).

Can I unscrew it without any risk for the switch ?

I wanted to do that to see if it would be simple to change the plugs (for WBT plugs) and eventually change the capacitors.

Thank you very much for your help
Best regards
Madien3388

[stephane RAME]

Wiring diagram

[Madien3388]

Thank you Stephane
But I've already managed to remove the screws ref 50966 on the .pdf file.
The screw I'm talking about is the screw from the back of the speakers which is also the internal/external crossover.
To open the filter, I must remove this screw and I'm not sure how I have to do that.

So if you know how to unscrew this screw without any risk, let me know

Thank you very much for your help