Experiment 1: Two holes on the same row same side form short circuit
Experiment 2: Two holes on the same row opposite side form open circuit
Experiment 3: Two holes on different row opposite side form open circuit
Experiment 4: Two arbitrary holes with a jumper wire form short circuit
Summary:
1. Two holes on the same row same side form short circuit
2. Two holes on the same row opposite side form open circuit3. Two holes on different row opposite side form open circuit
4. Two arbitrary holes with a jumper wire form short circuit