Step 4: rack step 1 : assembly
well, this part is pretty straight forward.
most wall mounts will include the RJ-45 jacks built-in, if not just put them in yourself - its just a couple of clicks.
make sure the jack is sturdy enough. the jack will get connected and disconnected many times, this is not regular use, regularly you would connect a cable once or twice in a relatively long period of time.
mount the box(es) on the wall.