I added some TL-Smoothers on my Anet A8, which helped my print quality a little bit. I needed a way to hold them, and after searching around for different solutions, decided to modify another design to my liking. This replaces the two spacers under the main board, to hold the smoothers close to the original plugs for the steppers. The wires should reach just fine even if you've already got them tied up nice and neat. The smoothers seem to get a little warm, so I chose not to use the cover from the original design, and opened up some holes on the back side of the smoothers also. Pretty simple and basic, but it gets the job done! :)
BTW, I'm using 3 smoothers, one each on X and Y, one for the Extruder. I don't think they are necessary on Z.
I printed this in PLA for now just to see how it holds up, but if the smooters get too warm I may need to reprint in PETG. Time will tell!