I am installing a Draw Tite trailer hitch on my van—it’s the hidden hitch so I took the bumper off and bolted the hitch on. Now I’m trying to put the bumper back on and was able to get the bumper “key holes” over the new M10 bolts and washers (barely) but only one side of the bumper will actually slide down into the narrower keyhole slot. The other side appears to be off by a 1/4” so the bumper won’t slide down in place over the bolt. These are factory holes so I’m at a loss as to how I’m going to get this bumper back on!