Doing some really important work on this... No, not ordering servos, a speed control, an rx, a battery, a rear end, or a sound thing, not even buying paint.
Bore lens mount into passthrough holes for led, make intersecting tiny hole from base into light base. Grab magnet wire, (mine came from a stock jeep speaker) scrape ends and tin. Poke through tiny hole and out a big hole.
Grab a red and yellow 3mm LED, file off the rim at base, trim short - leads for approx 1/2" oal. Solder short leads together. Take long leads + trim shorter, then put around 45 deg angle. Tack onto magnet wire, mark car side of wire with sharpie or something. I did Black to ground, red to red light, no mark for yellow.
Test. Put new LED pokey-bit assembly into the modified pokey-bit receptical. Test again. Don't be like me and not test the red side until it's assembled, then realize its bad.
By now it works, and you fully remember why you don't like magnet wire, and try to hype yourself up for round 2.