Just received my new GF3 + MGC PRO. Documentation is scarse (

I suppose that what applies to GF MKII applies to GF MKII ?
Some question :
- how do you remove dust cover ? I suppose I just have to unscrew the screws under the dust cover (I have to raise the cover ?).
-what is the use of the switch on the black box ?
- if there are some, are there some special settings for GFIII ?
- what is the use of the small platic bar with the two holes for the two black small screws ?
Thanks for your help.
Waiting for a correct documentation

Regards