stuck on sandtraps

[unstopp]

im like at the end of sandtraps i think and theres a gate blocking my way i just shot down a helicopter and theres like cars there what do i do and its not a electric gate its like made of wood and shit what do i do

 

[DrDevin]

go find 2 car batteries. 1 is in a car and the other in on top of a windmill. Then place the batteries in the house by the gate. There should be 3 slots for the batteries with 1 already filled. When they are in place the gate will be powered and will open