That ebay listing is for the same machine, including a manual. I can't find a digital copy anywhere, but maybe contact the seller and see if they will sell just the manual to you, or even be willing to scan it and email you a copy? Listing is only active for 3 more days!
Answers & Comments
Https://www.ebay.com/itm/Vintage-DIAL-N-SEW-SEWING-MACHINE-model-SL-2010B/133187178498?hash=item1f02931002:g:ioIAAOSwFTBddY0p
That ebay listing is for the same machine, including a manual. I can't find a digital copy anywhere, but maybe contact the seller and see if they will sell just the manual to you, or even be willing to scan it and email you a copy? Listing is only active for 3 more days!