Storage Migration Service - Source has one Volume, Destination has Two

So my source server is an old physical 2008 R2 server with one huge 7TB volume across a RAID 5 array.  It was a ton of SMB fileshares.

My destination server is a 2019 VM server with 2 3TB VHD's.  So I need to split up the volumes accross two volumes on the destination.  

But it seems my only option is to do 1-to-1 volume mappings.  Storage Migration Service is not showing an option choose which of the two volumes (on the 2019 destination serer) my various shares can split across.  

So is there a may to do this that I am missing?  Or should I reconfigure my VHD's to make just one big volume like the physical source server had?