E9 Blade Fuse Box Installation Manual
Below are photos and instructions given to us by our product tester. A few customers have contacted us saying the exact layout in their car differs slightly from the photos, but the basic process should be the same for all models.
Additionally, not included in the instructions is the included ground wire (ring on one end). Carefully plug it in to the small blade on the back opposite the switch, and install the ring on a convenient ground. This is for the LED indicator system, and the switch turns that on and off.