I've got three accessories I want to tap into the system for power when the key is on. An oil temp guage, a volt meter & a gear indicator. I know the volt meter reading will change when the rear brake is applied but at least it will show that it is working OK. (think that's OK) Will there be any issues tapping the three into the rear brake light wire? I was thinking of joining the three then tapping once into the brake. Any suggestions on another wire to tap under the tank? Bike is a FI XJR1300. I chose the brake because I'm a noob at this stuff & that one seems the easiest to get to. Also would there be any problems with tapping two wires, again joining them & then into an earth? The earth is from a USB charger that is going past where I'll be working.