Will this product work with a Vizio 40" soundbar 2.0?
I do not see how I can attach the soundbar mounts with my current soundbar. There is no manufacturer supplied hanger and the keyhole screws do not fit into the holes on the soundbar. Is there any other method?
Yes, but you may need two brackets due to the length of that soundbar. The bracket is not really very wide. I have 2 of these brackets, a small one and a large one. I use the large one for a Polk Audio center channel speaker and the small one for a Sony Blu-ray player. Both brackets work great.