Use an existing Bootcamp Windows external SSD Drive in VM for Mac

Hi,

is it possible to link an existing Bootcamp Windows 10 external SSD Drive into a VM in Parallels for Mac?

• I don´t want a copy of the Windows HDD on my mac HDD.
• I don´t want to migrate or anything in this direction.
  
• I want to use the external Win 10 SSD for normal boot up on any device (as Windows to Go) parallel to the vm
  (so this boot ability must not be lost)
• I want to easily switch between my mac os and my windows development SSD without rebooting all the time into one OS

If there is a solution without needing GB of HDD on my mac, it would be so great!