Scott 4500 psi 45 min. tank with tri valve quick connect set up problem.

I recently picked up a 45 min. 4500 psi tank with a good hydro date and several years left. The problem is it has a tri port quick connect valve on it. From what I've gathered the CGA-347 port is used strictly for fill (check valved) and the quick connect port is the empty side. My problem is getting the quick connect size and getting it set up appropriately. Has anyone dealt with the quick connect or have any info that can help? Thanks

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