2002 Legacy GT wagon hitch wiring

[Bonehenge]

Folks,
I'm trying to install a hitch on my FIL's 2003 Legacy GT wagon
so he an tow a very small utility trailer. I've previously installed
the same make and model of hitch on a 2001 OBW. The hitch install
went without a hitch. <G>

I cannot find a wiring harness for the lights! I've been in every
panel, done stare and compares with the OBW. I've come to the
conclusion that the spare connector is not present in the GT.

Does anyone know of a source for a proper adaptor, or "Y" connector so
that I can insert the trailer harness?

Thanks!
Barry