Looking for a simple, newb-friendly tuitorial for mobo instalation in a Carbine 400R

I haven't been able to find any tutorials on motherboard installation into my 400R Carbide that go into any depth beyond "offsets pre-installed, just screw it in." Unfortunately, I definitely seem to be doing something wrong, as the mobo can be fairly easily pushed and pulled back and forth, and unless I pull it away from the back panel I experience shorts.



Case looks awesome, is roomy, the Cosair youtubes are excellent for all other aspects of installation, but the lack of documentation is killing me on this one, basic issue.