Hi Ian,
I have searched the the housing and coolant hoses for the mc16, there is one for sale on eBay which shows the hoses attached to the thermostat.
One of the hoses should go from the rear cylinder head to the thermostat housing. I believe the rear cylinder head hose attaches to the side of the housing and an additional hose attaches from the upper plastic cover to the upper radiator connection. The longest hose from the bottom of the thermostat housing to the front cylinder head.
I’m sure someone else will be more specific shortly.