Larry31 - Where did you mount the voltmeter and how did you hook it up? I'd pop for one if I thought I was smart enough to install it.
As for mounting, follow the link in my original post and scroll to the small pix's under the first big image. Small image #6 ( Click on pix to enlarge.)
The nice thing about the LED Battery Gauge, is it can be stuck to any flat surface.
When I mount it to my equipment, I sometimes, make an adaptor plate from sheet aluminum.
I found a switched wire under the seat, next to the fuse for the fan.
I cut (only the insulation ) off the wire, and soldered the positive LED indicator wire to it. Wrapped it with electricians tape. Coated that with RTV to keep the tape from coming off.
The Neg. LED indicator wire was connected to a convenient chassis point.
I like using an ignition switched point on the bike, so it goes off when I shut down.
I used a 2 wire cable purchased from a local electrical supply. It has an outer insulated cover, that helps to protect it from being pinched, when I route the wire from one area of the bike to where the gauge is mounted.
2017 Yamaha XT250
1990 Honda NX250 (Green/White)
2011 Kawasaki KLR 650 (Orange & White )
My KLR Page..http://www.powers31.info/2011_KLR650.htm
Mod's to KLR:
Power socket, L.E.D. Battery Indicator, Camera bag holder
Custom Saddlebag frames .
Louder horns, Firstgear Onyx tail bag.
Custom Aluminum Skid Plate.
Cut down seat with Custom pad.
Go Pro Camera mount.