I Can't See My Car Trailer !

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 .

Had a magnetic one ,but it is somewhere between here and Fresno

No ,just trying not to run into something with my trailer . Bought a fully loaded 2001 E B Expedition with a blown up 5.4 for $700 and a Wrecked 2000 F150 with a 5.4 with only 57,000 miles on it .Almost like a new truck now, but i cant see the trailer behind it when there is nothing on the trailer .