This house was built in 2015. I am the 2nd owner. I am unsure what this opening is/was meant for. (see photos)
Somebody might have meant to install a panel and then had a change of heart. There are 4 anchors that suggests someone meant to attach some sort of a metallic cover, but it is not there. This looks like unfinished work. As far as I can tell, everything is functioning properly in my house.
Can anybody help make sense of this, and suggest remediation?
Shall I simply apply some stucco on the existing concrete boards?
(I am unsure what is best in term of water and pest proofing, but surely there is room for improvement!)