I bought a copy of Gyromite over the weekend with plans to make my own converter, for playing Famicom games. It boots up fine, but upon inspection of the board, I find that some piece has been broken off. I'm mostly worried that this could cause problems later on. I guess pictures work better than words in this case so I'll let them do their work:
This is what my board looks like, with the spot with the component broken off circled:

And this is one of the many images I found that show what the missing component looks like:

Well, the question is, is there anyone that would have any idea if it'd be possible just to buy a replacement component and solder it back on and what part is that anyways? I'm pretty alright with soldering, I just don't have any idea as to what part I'd be soldering on.
Any help would be greatly appreciated.