Husband, 30 male, 65, 200lb, has soft lump on right side of scrotum, not attached to testicle, its like kind of behind/under teste, theres an identical but smaller lump on the left side, too. is this epidermis or spermocele? im scared cancer?

Always have new lumps in testicles checked out by Dr. I cannot feel them from here.

If the 'lumps' are on the skin then they are probably sebaceous cysts and can easily removed in the office by a Urologist. If they are inside they have to be examined by a Urologist before a diagnosis can be made. From your description they are not cancer and nothing to be scared of. Best -see a Urologist