Here is your image of the RHS rear brake as fitted to your L/Rover
this is the brake assembly off the LHS rear incorrectly fitted to the RHS by some-one in the past.
I took a few images using the LHS brake assembly as fitted to the RHS of the differential housing, this is what it looks like
it will fit in another position as well, like this
,
but both are incorrect, here is the RHS brake assembly fitted correctly
it is so easily done if you are not familiar with the brake assembly layout, like I said before "you've never built repaired anything if you haven't broke something along the way" LOL, anyway Juddy hope thats of some help to you, cheers mate Dennis