BTW - as long as they are short bed 301's, they ALL fit in cabinets the same way. So you could have swapped out the mocha one by unclipping it from the cradle, and popped the black one in it's place.
If you have an older cabinet, you can put in the 301, but you have to cut the tab off the front flap and install the brackets the cradle clips to. You can still put a different machine in there, but you'll need to leave the clips as they will be the support for the front of the cabinet.