Locking RCA Cable = Problem with RCA input jack

Ok, so this is a bit embarassing, but last night I was trying to hook up some new cables in my system. I had never used locking cables, and though I had heard of them did not know what exactly was meant by the term "locking". I tried to connect them. The right side went in easily, but the left side would just not go in. I figured it was because the inputs were so close together and the jacks themselves were rubbing and blocking. I applied more force.

Long story short by the time I realized I needed to loosen them, I had apparently done some damage to the inputs. Now when the cables are in, and there is a source connected, no signal is passed from the source, but there is a buzzing sound. If no source is connected, there is no buzzing, even with the cables inserted into the amp(mcintosh integrated).

What did I do and can if be easily fixed? Fortunately, I have the CD2, and AUX inputs to choose from, but I am picky about my things and it will continue bothering me knowing there is something broken, even though it does not hamper its performance per se.