My car does not have a front centre armrest and I am considering purching genuine Audi one from a car breaker who has an Audi V8.

Will the armrest be difficult to fit since I do not believe that the seat on my car has the scoket in the frame to take the armrest (I realise the that the armrest fits to the left hadn seat)?

Has anyone successfully retrofited a front centre armrest to an Audi V8 that did not origionally have an armrest and if so, what do I watch out for?