I was looking at your setup, and I think a wire at the top of the fence would discourage climbers. Bait that with peanut butter, also. No need to criss-cross over the entire run.
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There will be TWO wires coming from the charger ... one will go to the ground rod you will pound into the ground ... hook an addional wire to the ground rod, and hook it to the hardware cloth ...
The second wire will be "hot" ... that is the wire you hook to the actual new fence wire that are held in insulators ...
A critter, or person completes the circuit between the two, when they touch the "hot" wire, and received the "ZAP"!
I was looking at your setup, and I think a wire at the top of the fence would discourage climbers. Bait that with peanut butter, also. No need to criss-cross over the entire run.