* High-pressure side: This is where the refrigerant exits the compressor under high pressure. It's typically connected to the condenser.
* Low-pressure side: This is where the refrigerant enters the compressor under low pressure. It's typically connected to the evaporator.
The wiring connections to the compressor will be related to the electrical power supply (hot, neutral, and potentially ground), not positive and negative in the DC sense. Improper wiring can damage the compressor and should only be done by qualified technicians.