Where should I configure the LED cables ? In order to make it work !!
To the side car OR the Power Distrubution Board ?
Typically, teams will use 12V LED rings or strips (they make a lot for automotive use, which also runs on 12V). Those can be hooked directly to the Power Distribution Board, although some teams also hook them up through Spike relay’s so they can turn them on and off at will. I would be very hesitant to try to power any from the Digital Side Car, as that has a limited amount of current it can put out.
Without knowing more about the exact product you want to hook up, we can’t really tell you where to plug it in.