as I understand one is to do the oil and one is to drop the gears out....which one is which lol

One on the far right is sump drain one in the middle is sump filler, i'd undo the filler 1st to make sure it comes off,

Two on the left in the frame hold the diff onto subframe.

+1 for undoing the top square filler bung first as the last thing you need is to drop the oil out of the bottom bung and find the filler bung is seized[emoji6]

I did it this morning all good