Part 3 is the aft interior wall of the LM. Parts 4 through 10b are various components that mount directly onto it. Part 5, the ECS Relay Box, has a couple cables leading out of it. Part 6, the Cabin Pressure Switches, is pretty small with a couple interesting folds into an L shape. Part 10a is a shelf and 10b is mounted onto it. The rest are just basic boxes. All pretty straight forward.
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