With the MLI Ultra Relay and Fuse Connect Kit, you can easily install all the required safety accessories in a safe, efficient, and compact way right on top of the MLI Ultra battery.Without the need for power tools, you can get your system, safe and ready in just a few simple steps.Fast and easy installation. All necessary safety accessories in one kit. Pre-assembled on an easy to mount bracket. Perfect fit for MLI Ultra 12/3000 and 12/6000.