Pete,
I used the generic WM bases---- might have been anchor. Try inserting the LED before replacing the bases--- you may get lucky with one being in the right position. Be sure to use a red and a green bulb / port stb, not white. Finally, LEDs are doped semiconductors "P and N" doping material, the electrons jump only one way to product the light. This means that it matters which way the wires are hooked up. Put the LED bulb into the base, then test the wires to see which way will light up the bulb. Switch the wires if it doesn't light. It won't hurt the LED if you get it wrong first try. And be carful you don't drop anything taking things apart---- those little screws will easily find their way into the drink.