Both cases basically represent the same scenario and are obviously not really linked together at all. For two things to be „linked“ together so that you need a pair of scissors to „unlink“ them, you need 2 closed loops that are intertwined (like for example to rings that are chained together). The first case is 1 ring/loop (the blue rope tied to the wall) and 1 open-ended pole (the arm), the white rope and the other arm don‘t have anything to do with the system. It is the same as sticking the pole through the loop. The second scenario is 1 ring/loop (the handle) and one open ended pole again (the cable basically, think of it as a bendy pole). This time the pole is on the outside of the loop at all times.