Are you talking about the living room or bedroom TV? To my knowledge, the living room TV is stationary. The bedroom TV is on an articulating mount. I have moved ours just to inspect wiring behind it. To do so, I unbuckle the 2 straps and pull straight out on the TV. No lock on ours. If there was a lock on the mount, we would not have straps on the TV for travel.
Maybe you have a slightly different setup. Ours was built in early February.
Curious, if you're taking about the bedroom TV, where are you watching the TV from that you'd want to pull it outward and swivel it around?
Jim