A remotely-operated fluid connection assembly to hold higher internal pressures in larger diameters. The assembly comprises a fluid connection adapter and a fluid connection housing assembly. A first seal section on the housing assembly sealingly contacts a first seal bore on the adapter when the adapter enters the housing assembly. Engagement of an externally-disposed locking ring on locking element outer surfaces causes inner surfaces on the locking elements to retain the adapter to the housing assembly via a lock engagement surface. The first seal section is further disposed to expand radially such that when the first seal section expands radially, the first seal section further tightens sealing contact against the first seal bore. Adapter displacement relative to the housing assembly preferably further tightens the adapter against the locking elements as now restrained by the locking ring.