no need to drill. if i remember correctly, the hole will be under the driver dash pretty far up from the dash area. you will see a huge black rubber grommet that is used for factory wiring. pierce a hold to the left hand side (no wires there). open the hole with a utility knife. spray some wd40 or dash cleaner on the grommet. slide your amp cable or anything wires need through easily. another area would be passenger to the left close to the ceter consol. (usually on civics)