Sealey GSS1508 - Manual (Page 7)

Step 2: Assemble rear wall panels.
You will find it easier to assemble your shed using sawhorses with timber studs attached ( timber
needs to be the same length as the shed (1.5M) or alternatively, a trestle table.
Place 1R and 1L on the sheeting your work table and join together with the self tapping screws
per the diagram.