During ejaculation, sperms are released from it's storage from which of the structures below?

Spermatozoa formed in the testis enter the caput epididymis, progress to the corpus, and finally reach the cauda region, where they are stored. It stores the sperm for 2-3 months. During their transit in the epididymis, sperm undergo maturation processes. During ejaculation, sperm flow from the lower poion of the epididymis (which functions as a storage reservoir).