Product review (5 stars): Works as advertised. My washing machine acted as if ...
Works as advertised.  My washing machine acted as if the load wasn't balanced a few days before.  I figured that's when the damage to the pump housing occurred, causing it to break and popping the hose off on the tub.  No instructions but on mine, a Samsung WA456DRHDSU, the new pump sits in the left rear corner with the grey rubber piece facing the left side and the pump outlet pointing to the right (opposite from the back of the machine).  I didn't need the harness.  You will need to reuse some screws and bolts so don't toss the old ones.

It took me a little over an hour using one arm, the other's in a sling, and a little help from an 8 year old.  You can do most of the uninstall by tilting the machine to the right side and most of the new install from the rear access panel.

There are some uninstall/install videos of this exact part online if you search.