I just put in a new battery, H5/MT47, to replace the Interstate H5/MT47, which was in my car when purchased in Nov, 2013.
i have learned that a vent should be in place, but find no vent tubing or vent pipe at floor present on my car.
I find a few offerings of vent tubing for sale, such as the single BMW battery next tube with 90degree elbow and grommet fitting. I also see suggestions for fitting tubing together with connections to both ends of the battery and a T connection for attaching to a vent pipe at the floor below the battery pan. I see a couple open holes at the floor below the battery pan.

For the 91 XJS, is there a Jaguar part number for the vent pipe that connects to the hole in the floor?
Is there a Jaguar part number for the vent piping which connects to the battery and to the hole in the floor?

Is there a photo showing the vent pipe connection in the correct hole at the floor below the pan?