On Oct 10, 2023, Greg Mando in Melbourne, VIC, Australia wrote:
"Inside the MGA Diff housing - what does this do"?

Notice the notch in the front flange at top of picture. That is clearance for the ring gear to pass when the differential is installed. The sheet metal baffles fit close in proximity to the ring gear. When the car is in forward motion, the ring gear throws a LOT oil onto the open baffle. Oil is then directed by gravity to flow outboard left and right above the baffles, following the baffles into the outboard housing tubes, all the way to the axle outboard ends, where is flows into the rotating hubs to oil the wheel bearings.

When the rotating bearing hubs get 1/3 full of oil, excess oil flows back into the the axle housing, where is flows by gravity back to the "sump" space in the differential housing.

If you have a few minutes to spare, see video here:
https://www.youtube.com/watch?time_continue=53&v=51BQkUafOe8
Skip to 5:20 to watch the oil circulate for 3 minutes.

If you want to see how oil flows outboard, you can leave the half shafts out of your rear axle and run the drive train. But do have catch pans in place under the hubs to catch out flowing oil.