Yep
Interesting thing is on some hulls the plate is welded on while on others it appears to be one piece with the recesses machined down to thickness .
Top photo is an M1 while bottom is a prototype Grizzly breacher vehicle.
These are screen shots of Egyptian M1A1 production & clearly show a weld seam here
but seems to be a full thickness plate with the recesses machined down to thickness here
