I tapped in at the fuse box because that is where my S&B relay ended up. There are a few places you could tap...@PaulF .. Thanks for the taking the time for such a detailed response Clever to use a latching relay set-up. Easy for me to do as I have added a waterproof relay fuse box and have extra relays.
Where did you tap the "Start" signal ?
Fuse Box area. White/Black is already fused so that is where I tapped. Solder and marine heatshrink required here...
Up front, you can use the wire right out of the ignition switch. It is Yellow/Red at the switch and turns solid Gray after the plug. You may want to add a small 3 amp inline fuse if using this location. If you can find the right plugs, you can make a plug and play pigtail and do it here without cutting, otherwise it is solder and heatshrink here too...
You could also go into the battery box and grab it at the starter solenoid. Again, fuse and you need the right plugs or solder and heatshrink...