I didn't wire it on the gauge cluster, but rather to an indicator light bar like shown under (once again quickly). I wired from the ignition to + of The sunshine, then calculated five.45V when grounded to chassis. 4AG Major Port to Big Port Adapter This is the Specific application https://griffinjhfdb.blogadvize.com/39804788/not-known-details-about-4age-20v-itb