Vehicle: 2004 Audi A6 Quattro 3.0L Tiptronic

I just finished doing a timing belt service on my car. Now I need to re-fill the A/C system. I have a manifold/gauge set, and a vaccum pump, but I do not know how to jumper the A/C Pressure Sensor in order to get the compressor running. The harness at the sensor has 3 wires (red/white, blue/??, and brown/??). Which 2 do I need to jumper?

Also, is there any way to bleed the power steering system?

Thanks!
M.G.