From memory and the pics above, I'd say the red arrowed hose is modine to heater - it runs down the block under the inlet manifold, round the back of the head where it crosses another hose (tight against bulkhead on saph) and then loops onto the heater pipe.
I believe the other modine hose is the 3rd one up, which goes to conenction by the coolant sensor under inlet and at back of head.
Both of these hoses are a complete pain in the arse to fit in situ if you have bolted on the complete inlet/throttlebody assembly!