I’ve been looking into fixing my 2011 Hyundai Sonata’s serpentine belt issue too. Growing up in Canada, tightening up cars was something my pops taught me. He’d say, “grab a Haynes manual from the bookstore—you can’t go wrong!” So, I checked out a PDF version on Amazon. A lot of folks swear by it for diagrams like that. Alternatively, try looking up online forums specific to Hyundai, some peeps there are goldmines of info. Cheers!
Had a tough time in Toronto w/ my '11 Sonata belt. Found a killer diagram on Hyundai’s site, but if not, try YouTube or Reddit, lil DIY forums are solid. Autozone sometimes helps too. Just gotta dig around a bit, I guess! 
