I am also adding a Watts up meter to the dash. I am going to use a 3 wire set up since I am hooking it up as a remote meter. I have it zip tied in to place temporarily to see how it will look. I will use some double stick to mount it on the bracket.
Here is the bracket. It's actually a reflector bracket I took off when I put on the rear safety light.
More to come once it's hooked up.