O2 sensor location names

[grandkodiak]

How are the O2's listed on my 96 Trans? Is Bank 1 passenger/driver or is Bank fore/post cat? Same question for sensor number.

IE.
Front of car
B1S1 - B2S1
cat - cat
B1S2 - B2S2

or

Front of car
B1S1 - B1S2
cat - cat
B2S1 - B2S2

[BlackLT1Z28]

How are the O2's listed on my 96 Trans? Is Bank 1 passenger/driver or is Bank fore/post cat? Same question for sensor number.

IE.
Front of car
B1S1 - B2S1
cat - cat
B1S2 - B2S2

or

Front of car
B1S1 - B1S2
cat - cat
B2S1 - B2S2

If I recall right, bank 1 is the driver's side and bank 2 is passenger side. Luckily for me, I only have 2, not 4. So, your first diagram is right.