my favourite design of battery dummy modified to be AA sized instead of AAA

use same M3 screws and nuts

if you have problem, that the head of the screw is not touching baterry terminal on one or both sides, or if you want to put screw in one side only, print Spacer_For_Battery_Dummy and insert it in (like in photos) 

you can use the spacer even if you use original AAA version