Mounting:
The gauge requires a rectangular cut out that is about 2 9/16“ x 1 11/16“.
It should be inserted into the opening from the front and the U-clamp will be
installed from the back. Tighten the two nuts on the U-clamp so that the gauge is
secure. Figure 2 shows the required cut out for the gauge. Figure 3 shows how
the gauge mounts.