do you have to play the highest die first ??

what if you throw 6+5 when you have one piece back in your opponents home .. the rest is in your home already so you cant move those .. one opponents piece is single 5 steps away from your piece-to-move ... do i have to move 6 first and then 5 .. and thereby not capture my opponents piece .. or can i move 5 first capturing him, and then 6 with the same piece ?