The limb combiner modes are pretty simple, so I skipped those. These pictures show how Mixmaster, Overload, and Scavenger transform and fit together, then the combined form limb arrangement. The second page is the same for every Constructicon manual.

Note: These three are from their repective instruction sheets, I cropped them and put them on one to save space.

If anyone would like a scan of something I missed such as the other Construction instructions, please don't hesitate to ask.