Does this "hole" have a use?

[Aussie Jeepster]

Has anyone found something useful to do with this access point in the back of the L320?
Just looking for ideas!
185015

[101RRS]

That is where I store my emergency stock of dunny paper.

[p38arover]

Does it give access to the fuel cap release in case of a failure of the electrical actuator?

The early P38A didn't have one. That was rectified in later models.