I used some M10 threaded bar for mine but I put four lights on mine used 3 foot sections glued the end nuts on left the middle one's able to move to even the light at different heights
the side with one lead coming out is for the plug to go in to an outlet the side with the v- v+ are to go in the plus and minus on the board then link the same on the other board or do a search on you tube. here you go