The "tee" in the conduit cup has four(4) 1/2" threaded holes and they(light arms) are simply screwed into it. If you have a two(2) hole tee it will need to be replaced. You can buy the block tees and a threaded conduit cup which does not even require a tee.You may call me if you have any questions and I will confuse you further. LOL Dave 706-323-0627
Last edited by Catauladave; Fri Nov 20 2015 11:47 AM.