Eureka Boss Vacuum I Have A Eureka The Boss Lite Upright Baged Vacuum. How Do You Change The Belt?

I have a eureka the boss lite upright baged vacuum. How do you change the belt? - eureka boss vacuum

OK, I'm not an idiot, and can handle almost everything, but adjust this gap to me. I see no screws or bolts should be removed to reach the floor plate or rotating the way, the size and engine ...