WW sofa wall mount

[ovrcr]

I recently acquired a weekend warrior sofa, converts to a bed. Base is particle board, with a folding piece for bed extension. Cushion is velcroed to wood base, and has two fold down armrests with cup holders. I did not get to see how the unit mounts to the wall. Does anyone have a cross-section of the sofa/wall interface? I know that piano-hinge will be part of the system...TIA

[ovrcr]

I recently acquired a weekend warrior sofa, converts to a bed. Base is particle board, with a folding piece for bed extension. Cushion is velcroed to wood base, and has two fold down armrests with cup holders. I did not get to see how the unit mounts to the wall. Does anyone have a cross-section of the sofa/wall interface? I know that piano-hinge will be part of the system...TIA