Hello, new expert here,
The switch is shown in the diagram below at #8
Click here for diagram
Let me know how I can help you
If the compressor is short cycling the pressure is too low or too high. High pressure can be caused by overcharging, the cooling fan not running or a blockage in the system. Low pressure can be caused by a leak or a blockage in the system or a failure to charge enough after evacuation.
You need to determine if the compressor is short cycling due to high or low pressure then find the cause of the high or low pressure.
You need a manifold gauge set to see what the pressures are. The can top will not help here. The system should be evacuated and recharged by weight as a starting point so you can see what is really going on. You have no idea of how much refrigerant is in the system so you need professional tools to diagnose this.
I guess your original question about where the high pressure switch was not what you wanted to ask?