your missing the mounting brakets, theres two brackets for either side of the cooler. One mounts to the chassis, then the other goes between the cooler and bov return pipe. the two brackets are then connected via a rubber mount (like a bottom radiator mount).
Dont mount the cooler to that bov return pipe on its own, as the only thing holding that return pipe in now by the looks of it,are the rubber pipes/hose clamps on either side of it.
Ill take a photo of what the mounts/bracket look like in the morning so u know
I hope that made sense, iam too tired atm lol