Gotta rotate the plug at least 3 times before it’ll go in too.

Want a life pro tip? Put your phone in selfie mode and put it underneath the TV pointing up to where the hole is and you can see it. That makes putting the cable in a lot easier in my experience. If it’s downwards facing ports, it’s super easy. If it’s backwards facing, it’s a bit harder, but the second point of view really helps out.

Plug in cables before you hang the TV on the wall.

It won’t do much good on the tv. You should try putting it in the tv port instead.