Pinch roller fell out

So…what I discovered is the pinch roller fell out of the camera today — no plastic cap or anything that might hold it on came with it…

Can I do this myself? I’m not sure what peg it goes on in there, and I need a way to keep it on now if I can, in fact, get it back in there. I’ve read stuff about a ballpoint pen tube cut just right. Does anyone have a diagram of the innards/image of where this goes and advice on getting it back in?? Bought it used “great condition” to transfer tapes to digital and worked great for one tape, then this fell out. Don’t/can’t dump any more money into this. :/