Prepare for the next step by flipping all the covers open. Helps to avoid them getting stuck when cracking the case open.

Use a fingernail or other non-metal object (to avoid denting/marking the plastic) to separate the case around the edge. The whole edge is held together with snaps that will come apart with just a little snap.

When reassembling, check at this point that you remembered the little 3-button panel, and that all the flip-covers are in place, they tend to fall off!