To add to that, the blue hose goes to the long pipe that that runs along the block underneath the exhaust manifold. The red hose goes to the brass angle connector in the back of the head. This pic is a bit more complete.
NB The picture of the matrix is wrong. Both of the pipes should come out of the front so they go through the holes n the casing. The one for the lower connection shouldn't be at the back. Bad error there on the illustrator's part. Pic came from here
http://www.historic-cars.net/histori...1384-4-Heating
