I have the Brooklands wheel on my M3W. It is bolted to the spline adapter by the 4 bolts visible in the picture, so in theory it could be bolted to an alternative adapter.
They don't have a picture of the back side, but Morgan used two different types over the span of M3W production. Given the listing states that it fits 2012-2019 Morgan Three Wheelers, I'd assume it has the older type.
