Hi Dave
The hawker battery is the same as a red top, I beleive the company was bought and renamed along the way but not definite on that. I have Hawker batteries for the Lotus 51 and Red Top in the 40. Neither have terminals that rotate so I would guess that you have a problem.
Also you have to be careful on using the right charger (DMS Technologies at about £70) to keep max volts in battery. Normal chargers do work but the capacity is not at maximum, so I am told! And never use a starter booster unit as this will kill your battery.
The only other tip I have on these batteries is that they are very good. Life span of up to 15 years compared to 3 or 4 for wet batteries which means they are also value for money at only twice the price of a good wet battery.
Hope this of help and interest.
Malcolm