can someone help me w/ my hitch problem? I bought a new hidden hitch but I have no wiring harness, I've found the round plug undr the bumper but I need something to go from the round plug to a 5 pin flat connector ( 04 armada)

If by round plug you are refering to the larger (1 1/2" - 2" blade plug). You can purchase an adapter from Nissan, or Walmart has them, I got mine from the local Autozone. I don't remember but I believe it was around $15.00. Good Luck