Does anyone know where the OBD II should be on my 99 Tradewinds, Cat DP, Freightliner XC?

Looked under the dash and the left side console and can't find it.

Scan gauge is supposed to work with diesels but where to plug it in?

Dewey, LBrandt found his tucked away up in the top of the fuse compartment at the left of the drivers seat. I could be wrong, but I believe this is where he told me it is.

Thanks Jerry
Talked to Cat and Freightliner and Linear Logic. No OBDII. There is a plug in the back and maybe in the front that the silverleaf will plug into. Round diagnostic plug. Diesel trucks are not required to have OBD so the mfg. does what they want.

Dewey,
After I posted, I realized I was talking about a different plug than what you were asking about.