Aftermarket gauges

So your original 8s elec style? New one has capillary(brass/copper) tube? We went with aftermarket triple gauges mounted under ac vents. Specifically went for elec on temp gauge. Cut wire to exact length. Can just replace sensor(and we did) with elec setup.
So to splice the Chrysler style boot on it had to be an electric gauge? That would have been nice to know when I ordered the gauge haha. Oh well