will this
BitFenix BFC-ARA-300-WKWKK-RP
fit this
HP z420 Workstation 400W Power Supply DPS-400AB-13 B PN 749552-001 749710-001
BitFenix BFC-ARA-300-WKWKK-RP
fit this
HP z420 Workstation 400W Power Supply DPS-400AB-13 B PN 749552-001 749710-001