Your inverter should arrive with all the required cables to hook up to your battery. Smaller systems have easy-to-use alligator clips to attach directly to the red (positive) and black (negative) terminals of your battery. You might also get a handy cigarette lighter plug for your car - simple to use, but will limit your power output to around 150 watts. Larger inverters need to be hard-wired to your battery. This is quite simple to do but if you are not sure always ask a professional.