Not the power master plug. The power master used 2 standard weather pack plugs. One was a 4 wire for the power master itself and a 3 wire for the pressure switch. Not sure what you have there.
The correct colors for the wiper connector are pink, yellow, green and gray. Yours appear to have the correct colors. Where it plugs in is between the wiper assy and inner fender, an impossible place to get at.