Advanced costume baby

How to adjust bra straps on the X bra, Lily of France? - lily of france

This bra has come in my drawer for a while, because I can not imagine how the straps connect to it in connection with, and how they fit! Help.

I accept attached to belts, if I tried, but a good fit. By the way, broke the strap. They are completely separate setting.
The bra is a great thing, silver X on any belt hook.
(The silver adjustable hook closure at the front is easy to guess)

I have to compare to other clips, but not only.
Loff I checked the website, but the images were not useful.

Thanks for the advice!