Does anyone know what these holes are on the side I know what one is not the other

[Aaron787gsx]

Hey everyone just out of curiousity was wondering if anyone knew what these 2 holes were on the lifer side of the ski I know one is for the fuel tank for the vent line but the other one I followed back and it doesn’t go to anything.

 

[noviceskier]

vent for battery

 

[etemplet]

Nice clean hull !! Extra points !!