Update:
Hi all,
In doing some research and discussing with SAP Support, we have determined that since the Logical System name of our new ECC6 system was changed, there is no supported way for us to re-use the objects already created in BW that reference the old ECC5 system (e.g. DataSources, InfoPackages, etc)
Use of BDLS is not supported by SAP in a Productive system for various reasons. See http://scn.sap.com/thread/1817160 for more discussion on this.
Another option if someone really wanted to go down this path is to engage SAP Consulting $ervices 
.
In the end, I created the new connection to our ECC6 landscape systems, and in Dev I recreated and transported all neccessary objects and any load processes from these to further upstream BW objects that were not affected (i.e. InfoObjects, DSO's, Cubes, etc)
Hope this helps. The lesson learned here was that the logical system name of an SAP system should not be changed during any upgrade if at all possible. If it is, you will need to rebuild any objects that interface with it.
Regards,
Darryl