The coiled tubule connecting the testes in males to the vas deferens is known as:
Epididymis
The epididymisis a tube that connects a testicleto a vas deferensin the male reproductive system. It is present in all male reptiles, birds, and mammals. It is a single, narrow, tightly-coiled tube (in adult humans, six to seven meters in length) connecting the efferent ductsfrom the rear of each testicle to its vas deferens.