I don't know on a car of your year.
Again, try gomog or somewhere for a wirining diagram.
Morgan wiring looms used to come in two parts: the main loom for everything forward of the passager; a rear loom for everything to the rear - rear lights, fuel pump, etc. The connector used to be below scuttle on the r/h side of the cockpit.
It's remotely possible but unlikely that the connector way have come adrift.
