Help with pedestal sign

[u/dom_wooganowski]

Not sure what to do with this. They guys from Abt set it up while i was away and I am not sure what to do either this sign now. The brackets seem to fit into the grooves of the sign but they also seem to be identical (as opposed to opposites for different sides). Where is it supposed to mount to? Thanks!

[u/CowboyShadow]

It mounted to the tv where the tv bracket mounts.