Yes, this works according to the following question/answer: https://www.digitec.ch/de/s1/QuestionAndAnswer/braucht-man-fuer-diese-wandhalterung-irgendwelche-unterlagsscheiben-um-die-vibrationen-abzufangen-23456
As far as I know, the Z906 speakers have a threaded hole in the back. According to the instructions, the matching screws (1/4") are included with the bracket (M or O). -> https://vogels-pim.s3.amazonaws.com/Assets/CE/Speaker-mounts-and-stands/Wall%20mount/UNIVERSAL/VLB%20500/VLB_500_Mounting-Instruction.pdf
Yes, there are screws and plugs for wall mounting and many other screws for the speakers including the logitech Z906.
I have this system myself for these speakers and it works.
Hello the birds are built for up to M8 thread size. This is the standard size for most satellite speakers. The screws are already included with inch thread and metric thread. I hope i can help you
I don't know for sure for this one in particular but the holes for the screws have a lot of room for adapting so I don't think you'll have any problem. I use them with a set of Logitech speakers and they adapt perfectly.