The one on my car is a different type of box and it has a Bosch motor and I think yours is a Gate motor.
Mine has the three bolt mounting but then it has a sleeve around it and a jubilee clip that fits inside the box.
I am back at work now so cannot post a picture. If yours is still out the car would you be able to measure the OD and length so I can see if the Land Rover one is the same sort of size as mine.
I bought this one to do up not realising AC cars are different. One of the contacts needs repairing but I believe it works, according to the chap I bought it off. It’ll be going back up for sale at some point for the same price I bought for £85. Either or no worries