to sc_serv.conf add:
streamauthhash_2=<copy authhash from existing streamauthhash>
or set to whatever you prefer for streampath_2
. if you want to give the stream a different name then you'll need to use the create authhash option, otherwise re-using the existing one will still give a separate listing but have the same title and related details shown for it.
to sc_trans.conf add:
and i'd suggest changing your passwords as you've edited the DNAS passwords but not from the Transcoders config (just realised that) and using 'testing' isn't particularly safe seeing as that's from the existing examples.