1995 Dodge Ram oxygen sensor locations?

Hey guys. I have a 1995 Dodge Ram 1500 4WD with the 5.9 liter. I recently purchased parts for a major tune up, and bought two oxygen sensors, one clearly labeled "drivers side," Bosch 15729, and the other not labeled (passenger side I'm assuming), Bosch 15704. Only problem is when I dove under to change them I can only find the one on the passenger side located right before the catalytic converter. I'm sure there's two, but where is the other located? And, if there's only one, which sensor do I use in this bung? Thanks.

There is only the one on that truck if it's a 1995.

I have the same 95 Dodge Ram 5.9L and there's only one, just before the cat.