Solution

The flavour text hints at the Connection Check module. Each of the diagrams corresponds to one of the graphs in the manual, using green for “connected” and red for “not connected”. The names of the graphs fit in the boxes and the circled characters spell out the solution word.

SLIM, 8CAKE, 6WUF, 9QVN, 20DGT, 15BRO, 34XYZ

LAUNDRY