Purchased varying 1 gang and 2 gang low voltage screw-in type brackets as seen here.
Upon inspection they appeared to simply sit in the wall with the the screws being screwed into the side of the dry wall; however that seems incorrect as now having seen this image.
Confusion has surfaced as the end goal is to install this and since this is an existing installation my concern is that I might have purchased a bracket geared towards a new install.
So…how do I install these brackets in an exiting drywall installation without having to use a stud or should I use a different type of brackets?
If somebody wants to add a bracket tag and re-tag the question that would be great.
EDIT:
Looks like this is what I should have purchased; will await confirmation from the experts.
Best Answer
I think you've answered your own question.
The first type of mount is for screwing into a stud, the second is for drywall/plasterboard.
You can still use the first type though.
Cut the hole for the switch in the drywall and then cut a length of batten just longer that the hole. Then fix this to one side of the hole inside the cavity. This is the tricky bit as you might end up having to screw into the batten through the drywall, which is going to leave you with a couple of screw heads to cover. If you can use an adhesive that should work as the bracket and light switch aren't very heavy.
Once the batten is firmly secured, fix the batten as illustrated on the web page.
However, I would first see if you can arrange an exchange.