He'* not talking the coolant elbow. He'* talking about the firewall side where the 8mm bolt holds the fitting into the tensioner assembly and then the heater hose attaches.
You sure can take it off. Alternator attaches in the back with a couple bolts and then here on the front.
The tensioner attaches at these points
Since you will have it off, if I get you the sizing on the O-ring would you consider making a metal coolant elbow from the tensioner to LIM? Not sure about the expansion/contraction of the various metals, but I'd be willing to be a ginea pig in the interests of a better design that others may wish to purchase in the future.