been butchered fer sure
I think "A" is where a ranco valve mounted, the brackets, one with the hole and one with the peg, would be where the control cable mounts, the bent flanges beside the hole would be where a component clicks in - "B" looks to me to be just additional warm air out when it's on full defrost position, I doubt they'd put louvers like that under the defrost outlet, and they do look factory
somebody appears to have re-shaped things where the e-brake handle musta been pinching their fingers against it, and they obviuosly wanted more heat on the drivers feet, choppin a hole in the end like that .... I'd be lookin for a new case!
Bill