Infinite Scroll Plugin for Ebuy theme - not supported

So Ebuy does not support infinite scroll, and my coding knowledge is minimal. I’m looking for some guidance as to how i can manually get in there and make infinite scroll work. Ive already got the plug in activated, but i am unsure as to what to put in the content selector, nav selector, next selector, item selector, and call back fields.

http://soballer.com/product/accessories/

thats what it looks like now. it shows 10 items, then you have to click on “older entries”. if anyone could help me set this up, id appreciate it! thanks