The harness comes with an inline fuse pre-mounted. Speak to us when you are trying to find a Supra Adapter to hook up with the stock battery harness (2023 model Sur-Ron and earlier only). Gives higher functionality through discharge and features overcharge protection. Pure nickel is Utilized in development, https://israelzhkrw.blogofchange.com/38395804/details-fiction-and-72v-sur-ron