That ass-whoopin should be enough to scare the schiff outta' him. It may make him more prone to snitch out his clientele list and cooperate. He is just now realizing that the CO's have his life in his hands. The man is his best buddy now.
And he ain't getting out on bail. Trial could take years. Boy's in for the long haul.
My take on Rainiere is that the beating was a tap on the shoulder reminding him to keep his mouth shut about any relationships he had with cartels.