confused belt system?

[kevinshane]

Hi sir, very nice job for the printer, I am building it. however the belt system confuse me a lot and there is no other reference except for just 1 or 2 images, I can't figure it out how they connect to each other, would you please upload some pic for the rear view or maybe the best is adding the belts to sketchup file, thanks!

[007foryou]

nice to meet you ,you could look coreXY on google