I went for the head on approach, and stuck mine right up in front. I used a 6 pole 2 pos switch, and I usually wire that to a single dual color led, but on this one I just used 2 led's, but mostly just because I liked the color. Works the same either way.
To use a 6 pole "X" wire top left to bottom right (poles) and vice versa and use the 3 on one side the same as a 3 pole...the center goes to the pcb ane the outside poles go to 5v+ and gnd... with the "X" wire making the other side the polar opposite, just wire the led(s) between the center poles.
A toxic agent on a dangerous mission so secret, even I don't know what it is, because if I did, I would have to kill myself. I don't even know who's side I am on.