During the pre-trip inspection of the lower fifth wheel on a doubles/triples combination, where should the locking jaws be closed around the kingpin?

49 CFR 383.115(e); AAMVA CDL Manual Section 7.3.1, "Additional Checks" (under Section 7.3 "Inspecting Doubles and Triples"), p. 7-3

A kingpin not properly captured by the locking jaws can separate from the fifth wheel under load or during a turn, causing a trailer to come loose from the tractor. This is a specific, testable detail examiners check for during the certified pre-trip inspection.