If the car is domestic, then the audio training will be the first stage of work. It is important to carefully stretch the wires through the floor of the car. Holes are cut as possible from the center on the shelf of the body. Dynamics will be inserted here. How to correctly cut holes? Using a drill and scissors for metal. First you need to make several holes with a drill, then complete the work with scissors. Vibrooplast is used to process the edges.