The stereo board is good to go with the standard IEC / fuse setup. If you have a deluxe chassis or the cool new 4u/400 special edition and the back panel kit you have what you need.
The dual mono setups need the added 1 fuse per channel. See @birdbox last picture a few posts up for how that is implemented.
The dual mono setups need the added 1 fuse per channel. See @birdbox last picture a few posts up for how that is implemented.