Installing wire to an auxiliary switch through the firewall on a 95 buick lesabre ?

I am trying to install auxiliary lights on my buick just don't know how to run the wires through the firewall I already connected the lights just need to install a switch on the dash and run the wires through the firewall ?

thanksInstalling wire to an auxiliary switch through the firewall on a 95 buick lesabre ?If you can't find an existing hole, you can always drill your own. Make sure to use a grommet and seal the hole with some silicon. Make sure you don't drill in to any wire harnesses or brake linesInstalling wire to an auxiliary switch through the firewall on a 95 buick lesabre ?find a hole where the wires go through the firewall already and shove it through. all cars have wires going through the firewall its just a matter of finding them. that or go under the quater panel in through the drivers door just stay away from the hinges.