closing up gap between bumper and fender

I've got uneven spacing between the front bumper and fenders, with the
passenger side wider in the front and not snug below the headlight
assembly on my 2002.

My assumption, and I'm guessing since I haven't got a shop manual, based
upon gazing at what can be seen under the hood is that removing the
wheel-well splash shield will reveal the fasteners that secure the bumper
at the side, and that I will be able to tighten something to square up the
gap.

Anyone know more about this? Thanks!

Frank