Hi, thank you for contacting JustAnswer.com. My name is Russell. I'd like to provide the right answer for you.
I think there is no good answer to your question.
If your 'USC-1' jukebox is the Seeburg USC-1, like this:
then it certainly can't have a memory card, since that model was made only previously to 1980, when there were no memory cards.
What sort of memory card does whatever machine you have actually seem to take, please?
And, what is the actual maker and model # ***** your jukebox?