It seems you are trying to mount it to the tv... but then you want to mount it to the wall. Either way you are correct you get two heyhole slots to work with.

I have had success with the Sanus sound bar accessory. It’s not perfect but it works. I don’t like the key bolts that Sanus uses.

The sound bar does not weigh much. You can mount it to drywall with wall dogs. Again it’s not great but it works. Togglers would be better. There is a full size template in the box which is helpful when wall mounting

Be aware it is 120 volt power cord direct to the sound bar. No power brick.