Oil pressure sending unit location

On my '94 1L Metro, I'm looking for the oil pressure sending unit. Anyone know where it is? (I want to tee into it to install an after-market oil pressure guage.)

I thought it might be the unit on the front of the engine below the exhaust manifold, above the oil filter. If it is, can someone please confirm that for me? Thanks. Much appreciated.
- Coupe7

that should be it, it is near the oil filter and should have one wire coming out of it.

Thanks so much M3.