Alisoncc,
Are you by any chance thinking of the Air Start connection from the Palouste, which did indeed live behind the Stb'd undercarriage bay, and did indeed connect vertically upwards as opposed to being angled??
This is all I can think of which lives on that side of the aircraft and indeed connected to the airframe in a vertical plane. As I understand it (but
forget would be able to confirm or deny this) the Palouste would not have been used anyway in an alert situation, so the vertical connection was not relevant.
Hope that may have jogged the old memory!!
Flipflopman