My in-laws want to mount a new TV on the wall and have asked their contractors (they are in the middle of a renovation) to open a hole above their gas burning fireplace for routing cables to/from the TV. The contractors opened up a hole to the right of center.
Are there guidelines or special tricks for placing the hole so that they would work with all TV mounts so that the mount can be centered above the fireplace without interfering with the hole?
Or do I have to first buy the TV mount and TV to figure out the best placement for the hole? (In my case since they've already opened up a hole I guess I would have to buy mounts that would work with the hole)
Do manufacturers of mounts have any special specs that they design to?