air conditioner

The white wire that connects the AC compressor to the wiring harness has broken. I can't tell where it attaches to the harness. Does anyone know where to find the attachment point and how to get to it? It's tight. Any help would be appreciated.

I had an issue with my AC this summer. I do not use it much but when I went to use it I would only get warm air. So, I knew that it needed to be charged. My understanding is that AC systems are a closed system. The dealer told me no, that the gas gets "used up." I said that did not make sense...