Just use the bare wire no neeed for any other connection. So far as the T bracket, check how it engauges into the tabs mounted on the back of the QS8 before installing the T on the wall. Just ensure the bracket slips under the mounting tabs on the back of the QS8, if it is a little too tight - really hard to engauge, then make some adjustments to the T bracket tabs to allow for easier installation by bending them slightly out.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70