There are no wires in that location, if I understand your description correctly. I've had my bumper cover off several times to install tow hooks, and later, AtTheHelm's front recovery system. The only wires I had to disconnect were the wires going to the turn signals and side marker lights, and those wires were not in the middle area. There are no wires between the bumper skin and the center metal crossmember, in any event. I cannot say if there are any wires behind the center metal crossmember, if you are drilling through that.
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2008 Liberty Sport 4x4 Automatic
Jeepin By Al 4" Lift Kit
BFG KO2’s 245/75R16
Full MOPAR skid plates
Rock Lizard Skink Super Sliders
AtTheHelm Front Recovery System & Roof RackM116A3 Trailer build thread: viewtopic.php?f=72&t=77997