How do you connect your single wire and jumpers ?

The possiblity of your being able to hear a difference between having the cable on the high, low or diagonal posts are somewhere between zero and none. The only possibility being if you have REALLY cheesy jumpers. In that case, doing the diagonal connection could cause a disparity between your sections.

I have PMC GB1 speakers and i use the same kind of cable as jumpers.

Tvad and you others do you connct the jumpers first and then the single wire ? I use furutechs rodium bananas.