2.2 AW71 Here are the instructions for replacing the tailgate harness wires. Step by step. I'm not sure 6 inch extension ratchet someplace to put the tailgate that will not damage the wiper arm. The correct harnesses for your brick. I suggest replacing both sides.
Pictures can clarify a lot.
Although two people at one point would be a great help there is a way to remove the tailgate with one person. First the prep work to allow easy reassembly. Have your work area set up to give you easy access to the rear of the vehicle and one rear door with the rear seat down. You will at one point have to crawl into the vehicle to release the hinges from the vehicle body. Turn off the interior lights.