Product review (5 stars): Quick shipping and worked perfectly after I figured out how they are installed
I didn't even know I needed these until a moving company told me about them.  The installers did not leave them when the took them out.

For my washer WF350ANW/XAA there are four large keyhole looking holes where these bolts need to be inserted.  You may have gray covers that you need to pop off.  The bolts themselves must end up going through the small key portion of the hole to be aligned properly, and not centered in the large part of the hole like I initially thought.  If you shine a flashlight into the holes you'll notice the threaded holes in the drub are centered on the small part of the keyhole, and not the large.

It's helpful to pull the bolt out of the large white housing until only 1/2" or so of the tip is protruding.  Then slide the whole thing into the large hole taking care to aim the tip at the threaded hole in the drum.  You need to push the white housing all the way in past the outside keyhole then slip the bolt into the small part of the keyhole.  You may have to push the white housing a bit hard to push the drum back so it goes past the outside keyhole.  At this point the tip of the bolt should be in the threaded hole in the drum, the washer and cable bracket will be outside of the keyhole, and you can begin screwing in the bolt until tight.

If you have trouble seeing what you are doing you can remove the top cover of the washer by unscrewing the two 10mm bolts on the back of the top cover.  This will allow you to see where you are putting the bolts on the inside.

My guess is the bad review had the same problem I initially did thinking the bolts had to be centered in the large part of the keyhole.