A kitchen cabinet made of metal in a house built in 1951. I think the kitchen was remodeled in the 70s. We are trying to figure out why it’s vented.

A kitchen cabinet made of metal in a house built in 1951. I think the kitchen was remodeled in the 70s. We are trying to figure out why it’s vented.
Answer: Maybe to hang tea towels to dry off. The grate will be for ventilation to help dry them without them getting musty.