Thats pretty easy If i understand you right but you still want to run a backup as step 1
Basically you disable quiet boot in the bios, install the new controller, and then press F to import the import foreign array when prompted , and then run consistency checks when its all done.
ps- if you get a message that all your disks from your previous configuration are gone. Please DO NOT PRESS C.
Press any other key to continue. importing the foreign arrays. (This message just means that the previous drives/arrays on THIS adapter cant be found - which you dont care)