No rule for this one
No ending or word group predicts the article of Kabel. Learn it as a pair and say it out loud: das Kabel.
das Kabel
It's das Kabel. Kabel is neuter, plural die Kabel.
Das Kabel ist kaputt.
The cable is broken.
No ending or word group predicts the article of Kabel. Learn it as a pair and say it out loud: das Kabel.