From the pic, it looks like another one that hooks into the soundhole. That is something I wouldn't do, especially with a solid top, as it puts weight/pressure onto a delicate area and can damage the top.
Aloha Bruddah Stan,
I'll try to check it out this week if time permits, if not, when I return from Honolulu in 2 weeks.
Noted the area code is San Jose, California, in the phone number.
See you soon.............................BO...........................
The person who posted on the HI craigslist not only has a 408 (California) number, but their site is also CA where they say they're a real estate agent selling HI vacations.