Here's a picture of the plow used by the StandardTwin walk behind tractor. That bracket you're referring to actually lifts the plow when the handles are raised. The Viking was similar.
Items number 6 and 7 and that bracket is made somewhat different than used by the Viking. I still have an extra plow point. The framework I made for the Wards tractor was copied from the
Viking handlebars and drawbar by making templates
from white cardboard. The hardest part was bending the metal so each piece had the same angle as the handles. Hal