@mrfig, Fabian, You did not state front or rear, regardless, do not try to re attach that old brake line, hydraulic pressed on fitting is broken/ripped from hose and will have to be replaced with a new brake flex line/hose assy.. You can look up replacement part on line or just pop into any local auto parts dealer and they will have or can get you a replacement flex hose/line quickly. Links below, installation instructions of brake flex hose/line and bleeding the air from brake system,4th and 5th are possible part needed as an example. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.
https://www.youtube.com/watch?v=iE9LM1pp...
http://www.wikihow.com/Change-Brake-Line...
https://www.youtube.com/watch?v=ag-Q_lP0...
http://www.autozone.com/brakes-and-tract...
http://www.autozone.com/brakes-and-tract...
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@mrfig, Fabian, you can try using this link to add a pic., if need be.
Adding images to an existing question
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