Remove the Input Jacks. This part is snapped into the PCB then soldered, I find it easiest to remove the solder from the back side first then remove the jack. You can also clip the leads on the solder side of the PCB after the solder is removed to aid in removing the input jack

Install the new input jacks—The leads are already dressed. Please refer to the pic for the correct placement of the wires. There are two versions of the USA Blues series, in each case there are three wires to connect. The Ground, switch, and Tip.

If your old jacks look like the one on the left wire according to where the old pins were. If your PCB looks like the one on the right then wire for that configuration