What I came up with will work on any Goldwing or other brand of bike.
First off I located the smallest possible voltmeter I could find which also proved to be the cheapest at $13.69 Cdn - Bonus! Not only that but for that price you get four voltmeters, one each with Green, Red, Yellow and Blue displays.
The ones I used came from Amazon.ca and can he found at amazon
If your in the US they can be found on amazon.com for the grand sum of $7.89
https://www.amazon.com/HiLetgo-Voltmete ... ref=sr_1_2
After much head scratching and hours of staring at the dash I finally came up with a really simple, unobtrusive install.
I first coated the back of the voltmeter with hot glue to weatherproof it. When that dried I sprayed some contact cement into a container and brushed cement onto the top and back of the voltmeter. I next brushed contact cement onto the fairing just below the right hand speaker on the underside of the speaker housing and on the back vertical face. When Tacky I pushed the voltmeter into place and held with a bit of pressure for about 20 Seconds. I wired it to the accessory terminal on the fuse block. As previously observed it reads about a half volt below actual battery voltage as measured with a voltmeter, but knowing that I can compute actual battery voltage very easily and now have a handle on what the alternator is doing.
End result is almost unnoticeable when off, reasonably out of the rain, very readable and below the line of sight when riding such that it will not interfere with vision at night.
Photos below show both on and off look.
