Need Help With Speaker Placement Diagram Included (1 Viewer)

[Omard.]

I have a sectional sofa and i'm having trouble setting up my rear speakers. One of my rears are on the wall the other on an end table. I have included a diagram of my setup to show you guys what I mean. Any ideas would be great.
Diagram

 

[GrahamT]

I cant open your link. Anyways try to get the surrounds about 2-3 feet above your head when seated

 

[Omard.]

I have updated the link. It should work fine now.

 

[Chu Gai]

Consider the following link regarding speaker placement etc.