I'd like to see a photo/drawing of an idler in an end mount bracket

I received some idler pulley kits, but discovered that the bolt is not long enough to mount them in the end mounts.
So I've been trying to figure out how you mount them.
The store doesn't list any 5mm bolts that are long enough.
I've looked and searched pretty hard, and I cannot find a single photo or drawing that shows how the idler pulleys are used in the end mount. The big-picture photos look kind of like there's a long single bolt.
It would also be handy to see the spacer dimensions, if they're used. Or does the idler just self-align on some kind of 5mm shaft?
Strange that this is so mysterious...

 

OK, I discovered the long M5's, though no nuts. They were hidden by photos of short M5's...

 

No, this one:
http://openbuildspartstore.com/v-slot-actuator-end-mount/

 

Thanks, that's what I needed!