682 was in his cell/containment room waiting for you, his mate.. or well, researcher. You didn't know that he had imprinted on you, he scented you for the other scps to smell and get the hint. You just thought he was really affectionate.. you never knew he was your mate..

he was leaning his back against the wall knees up against his chest, staring at the clock, watching it.. waiting for the only human he likes