I had to pick up a Mustang the other day ,and with nothing on the trailer i can't see the trailer when i am backing up. I have a bunch of compressor hose connectors ,You know, the ones that start leaking air a week after you put them on the hose I got an Idea , i drilled a hole in the very end of the trailer side rail and threaded it for for one of the hose nipples .The coupler can now be clipped on and removed ,i did this on both sides of the trailer .I have a fiberglass rod epoxied in one of the couplers for now but i will get a ATV flag and pole to epoxy in the next one .I should be able to put a light on the pole and a plug in down by the coupler for night time .When not in use,or when i am loading or taking a car off the trailer i can take it off and toss it in the trailer tool box .