I cant answer this because it will be depended on other variables.
I did do this with another kext installed in /Extra, and found out it wasn't loaded. The kext from /S/L/E/Family...kext was loaded, because it was dependend from the family.
Then I moved/copied the family as a whole into /Extras and it works.
My suggestion is experiment with this. But keep the permissions right.
HTH