Mableaudio 5E3, Assembly Manual, Page: 8 / 39

Find the other two potentiometers. On each of them, bend Pin 1
back and solder it to the metal casing as shown.
Tip: To get solder to stick to a solid metal surface such as the
back of a potentiometer, it helps to “rough up” the surface first. You
can do this with a power drill or Dremel tool with a grinding
attachment. You can also use a file.
Install these potentiometers in the two open
positions (Pot 2 and Pot 3) and solder a
470pf capacitor from Pin 3 on Pot 1 to Pin 2
on Pot 2. Use a small piece of tubing, heat
shrink, or insulation stripped from a wire to
insulate the lead that goes to Pot 2 from
touching the grounded lead.
Solder the yellow wire from Pin 2 on Pot 1 to
Pin 3 on Pot 2.
Install two threaded standoffs to the chassis for circuit board mounting