Plug in by the hood release handle
 

What is this little plug for?
Its right next to the hood release handle under the dash.:argh::argh::argh::s::s::s:

gotta pic?

trailer brake controller maybe? or where you would hook one up that is, possibly

A little 2 wire plug, right? That's a diagnostic plug for the ABS. The service techs would plug in whatever kind of reader to be sure the ABS system was working properly.