V40 1.8 of 98 tensioning roller completely broken out

Moin Together, more often something new. I bought the V 40 since March, 1.8 automatic, for small money, did a lot and now that. This morning after about 1km drive it made short Klock, battery warning lamp, no servo support anymore. Stopped, looked after, ribbed belt broken. Back home, removed, measured, ordered. So far so good. Just wanted to look how I have to install the exactly….where is the tensioner? It was on the lower engine cover. How do I solve the I used to hang pictures, I can’t take pictures directly, the mirror had to come here. I hope you can see enough.