You can use the line fitting at the caliper , but you will not get all the air out..

The best you can do is to open that line fitting after taking the pads out...then push the piston all the way in from the pad side ..that will clear most of it.
Then tighten the fitting
Then put the pads back in and you are done.

The only real fix is to get new bleeders, but getting the old out is tricky and most wind up having to relpace the calipers...but my trick works for a car you don't want to put the $$$ into and still have some descent brakes.
Next time , soalkthe bleeders overnight in PB Blaster when you know you are going to do brake work ..[ yeah, I know .. they were already like that and it musta been the last guy, right ??}

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A Dalton