I forgot to mention I screwed up when I ordered the lights for the wife's Exploder; I got 6 led versus the 4 led version lights. The 6 led was too wide for her mudflaps, so I took the 4led off the Expedition and put the on her car and fit the 6led on the Expy. Pics follow;
Expedition:
You can see the old holes from the 4led light. They are covered, so I don't care about them. Just make sure you make the hole for the wiring 'snug' so it compresses the rubber grommet and keeps it tight on the wire. As long as you keep the lights mounted low on the mudflap, they won't be blocked by the exhaust on passenger side.