Quite all has solved. Here are some answers:
Brava 1.9 JTD105 (1999): there is not a standard OBD 16 pin socket, but more dedicated diagnostic sockets; for example here is the "injection socket", compatible with OBD 16 pin connector K-Line:
(thanks to my friends Joske and Jug)
OBD Connector Pinout:
Pin 4 - Chassis Ground
Pin 5 - Signal Ground
Pin 7 - K Line
Pin 16 - Battery Power (+12v)
pins 4, 5, 7, will be directly connected to the 3 pin connector on the car using some wire.
Brava 1.9 JTD100 (2000):
It has a standard OBD socket, under the felt down the internal fuse box (driver side)
(Thanks again to Joske)
Bravo HGT 20V:
The "injection diagnostic" is in the same place as the fuse box as
Brava 1.2 16V (80):
Quite the same as HGT; you should instead find against the
metal wall, under the windshield glass cleaners.
Hope this useful...