HI to all I put two wires on the positive pad- the blue and usually one of the teal/green colored wires as I do not use them (could be purple or pink, too). Then, I put an 0201 or 0402 LED with an inline SMD resistor of 1.5 to 3.3kOhms (depends a bit on what is close at hand when making the lights). The blue and white go to the front LED, the "other blue" and yellow go to the back LED. Then, go into the LokProgrammer (if you have one) and change the light assignments as you wish. Normally, the white (actually switched to ground) will be assigned to forward, and the yellow will be assigned to backward. You may have a delayed turn on/off for the headlights, another CV selection.