Try 0 and 1.
I just went through this with a 5 gpu rig last night/today...looking for the same thing and all I had to do was manually enter 0-4 in each miner.
I have 0 and 3 though. Are they the locations of the PCIe slots?
I am not sure...maybe its just the number of the tab...the adapter/os ID is in the individual tabs then from there you can tell which miner is physically which card...I would imagine adapter 0 is the first PCI-E slot...pretty easy to tell...start a miner and see which one heats up, match the temperature dropdown to coincide.