Welcome to the board! My search engine for that machine shows me pictures of one that looks the same as the 117.552 and 117.810j I had. Here's a link
https://www.manualslib.com/k/kenmore+117.720.html
Try the 117.552. The tricky part on these machines is threading through the tension control, other than that there's not much to them. You could look at the manual for the 117. 959, it has the same tension control and the picture might be better, I didn't check.
There are vintage Kenmore groups out there, maybe on facebook and other places, I'm not sure. Someone there might have a better manual scan.