I read an article where an anthropologist was speculating that the Olmecs were the remains of what was once an over the land version of the Panama Canal...moving goods across land from one ocean to another. If you look at Olmec art...they have every racial type covered in their art.
I even had a picture (no longer) of an Olmec statue that looked exactly like a Jewish Rabbi. A trade route between east and west would encounter all racial types, eh?
Another guy speculated that they were refugees from the Shang dynasty collapse where it was written that 250,000 'took to the sea'.
Others have wondered where the 'build-up', the evolution, of the Olmec culture can be found...it's not there. It's appears to have 'sprang up' fully developed.
Anyway, this port may be related to them.