Weird water buildup

Was just looking through my engine bay cause I always monitor for mice nests and found this water buildup on top of the transmission I think it is, any idea what it could be? I stuck a straw down there and smelled it and it has no smell, not gas or oil seems at least. The color is from a previous mouse nest there so that would explain that. Anyone know what’s in that corrugated rubber tube? Only intake for mods. Thanks!