The description of the "retaining flap" that needs to be "flipped up" should be more precise. It's a tiny length of black plastic that blends in with the surrounding black materials and just looks like a part of the casing around the ZIP connector. Even the photo's don't really show what is being done. I started picking away at the teeth of the ZIP connector before I got nervous, and randomly picked at the "flap", breaking it off in the process.
So, my version would say something like..."The ZIP connector is locked in place by a small, black length of plastic just below the connector pins. This piece of plastic must be carefully picked at from below with the spudger until it pivots upright. During reassembly it is crucial that it be repivoted back down into position in order to establish the connection."