My 1200's heatbox's control pannel is stuffed anyways, no heater + the coolant control valve is stuck shut,

I havent seen blank off's, will go pick up a plug today and make another hose joiner without run off...

The way I see that diagram is that with the heater off its got no coolant flow, with the heater on its removing temprature, so by blanking the hoses and removing it will act just like a stock setup with the heater turned off...