The 2005, 2006, 2007 and 2008 Winnebago Adventurer 38J had 3 tall windows on the passengers side. Here's a link to the 2005, 2006, 2007 and 2008 Adventurer brochures. About half way through there are pictures and floor plans of the 38J.
https://winnebagoind.com/resources/brochure/2005/05-Adventurer-bro.pdf
https://winnebagoind.com/resources/brochure/2006/06-Adventurer-bro.pdf
https://winnebagoind.com/resources/brochure/2007/07-Adventurer-bro.pdf
https://winnebagoind.com/resources/brochure/2008/08-Adventurer-Brochure.pdf
