The Morgan wiring loom ends, for the radio connection, in 2 rectangular female connection blocks, one is for the speakers, the other is power and so forth. These are to a common ISO size, shape and wiring layout.
Wiki explains:
ISO Between these and the radio is a single 2 into 1 connecting cable block, with many wires. These ISO to Radio connectors differ between radios, even different models from the same maker.
So when removing the radio from one car it is essential to remove this link connector. If you have removed a radio from one car you may find that there are no ISO connectors and the radio is hard wired. To fit it in another car you have to buy the specific connector block.
As far as using the MOG Antenna for DAB is concerned, I got a powered splitter from these people:
DAB On Wheels It is powered by the feed from the radio that would otherwise power the antenna. My radio needs 2 12v feeds, one is on all the time and the other is the power proper.
The result is excellent: the radio works best with the MOG antenna only extended by one section.
When I sold Aldermog I removed the DAB radio and put it in Tarka, the Morgan supplied radio went into Aldermog.