HO Searchlight car

This is a searchlight car for HO. It uses 3 L44 batteries instead of track power. You will need a couple additional things to complete it: White LED, Wire 28 or 30ga (from a keyboard or mouse cable). Metal clips for the battery, a small switch.
2mm x 4mm, or 2mm x 8mm, or 2mm x 10mm machine screw, depending on how you want to mount your coupler. You can also use 1.8mm X 6mm sheet metal screw.
There are 2 different reflectors. One is slightly larger than the other.
There are 5 different flat cars.
DB3 uses a clip on coupler cap 3A.
DB4 has a coupler stud.
DB5 has coupler holes for a 2mm x 8mm screw and uses coupler cap 5A
DB5B has a coupler hole all the way through the body and uses coupler cap 5A
DB7 has truck mounts for a truck and coupler assembly.

Link to the video: https://www.youtube.com/watch?v=LNk7fl3VFUc&t=1s