My 8 port multiplexer and 8 port KM switch should be here today. I have seen reference that you do not need a Y-Mouse, but I cannot figure out any way to connect the KM and multiplexer without a Y-Mouse for each computer.

I found this image that supposedly explains it, but I'm just not getting it. If someone could explain to me, how I can do my setup so I can switch between any single comp, or all of the comps at once, without a YMouse, I would greatly appreciate it.