Is it the accessory skid or the factory black one? The factory one should be unaffected by the Safari bar. The accessory skid attaches and uses both holes in the radiator support rails where the frame rails end behind the tow/tie down loops.
I don't recall which Westin bar model, but one of them has an accessory skid from Westin that goes from underneath upto the lower crossbar. It has Westin etched or laser cut from the skidplate.