Hi Mark, thanks for initiating contact. The main battery wire on this starter is typically installed on the large terminal located on the solenoid side of the starter. This terminal is usually labeled "B+" or "POS." There are several videos online with step-by-step instructions. Just type "How to replace starter" and add the vehicle's year, make, and model in the search field. If your vehicle information matches this product, you can use the link below to order while the part is in stock. Your order will come with a 30-day post-purchase price match guarantee. Enjoy shopping! https://www.carparts.com/starter/ac-delco/ac3362204?can=CPGG4850_CSQA_20240920