A power distribution box assembly having a power distribution box, a plurality of wire assemblies, a holder and a plurality of sets of resilient fingers. The power distribution box having a housing, which defines a plurality of terminal cavities, and a plurality of conductive busbars, each of which terminating at a busbar terminal that is received in a corresponding one of the terminal cavities. The wire assemblies are coupled to the busbar terminals and extending from a rear side of the housing. The holder is received in the rear side of the housing and engaged to the housing in a snap-fit manner. The holder has a plurality of wire channels, each of which receiving an associated one of the wires. Each set of resilient fingers has at least one finger that is resiliently coupled to the holder and configured to engage an associated one of the wires.