Connecting to Horizon GX2200 AIS, GPS, DSC?

I was able to connect the AIS signal from my Standard Horizon GX2200 VHF to my e7D and can see all of the AIS data on the MFD (there appears to be a dedicated AIS NEMA 0183 line on the GX2200).

While planning I was wondering if there is any value in also connecting the DSC data from the VHF to the MFD, and the MFD output to the VHF? I assume that would also provide a second GPS/Location value for the MFD, but I'm not sure that would do anything?

Any thoughts on this would be much appreciated.