Nick covered it, Bare wire is necessary for the T bracket to be used, if you use the FMB then you can use a banana plug but it really isn't required as you won't be removing them alot.

You are hard pressed to see the FMB behind the VP150, I wouldn't worry about needing to install the FMB sideways, which I wouldn't recommend anyway, that would put stress on parts that were not designed to take that much pressure.

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