how do u jump a/c compressor?

[angst]

My compressor is not turning on. After a late night searching archives Im still not clear on how to jump the compressor. My retired H+A friend stopped by yesterday and took a very quick peek said that I should jump the positive wire coming off the compressor to the battery. It looks like someone had done this in the past cuz the wires were stripped back. When I do this nothing happens. The wire actually has +12v going through it already. Am I supposed to arc across the pos. and neg. leads somewhere?
I do know that I have a really slow leak and want to try jumping the compressor to see if it will pull more coolant in. I am aware the hazards of jumping it for too long.
The low port reads like 60psi but I understand that that reading does not mean anything until the compressor kicks on.
Also FYI its on 134a and the only fuse I found blown was the aux fan fuse.