Neal
TJ Enthusiast
The reason there is so little room behind the metal on the passenger side is because the evap canister and associated hardware were moved there from under the hood somewhere around the 2003 model year. It sits on a tray that is hidden behind the wheel well cover. To be honest, I don't know a way around that, other than switching to a surface mount light. Hopefully, someone smarter than me will have come up with a solution that will work for you.