Mustanggt9589

i bought a chrome radiator cover from upr when i was down at the spring shootout in florida. I went to go install the thing and it said to put these rubber doughnut looking seals on the radiator supports so i did. Problem is they don't fit the little peg thing that stick up from the radiator. I tried wd40ing the peg and doughnut seal with no success. Anyone ever install one of these and have the same issue??