This upgrade was built to only use extra parts given with the Anet A8 kits
+Attach it to the back of the extruder carriage with two m3 x 18 screws.
+press one end of the belt into the belt holder with a flat head skew driver. I used a small flat head to spread the jaws on the holder then pushed the belt in. the fit is meant to be very tight!
+use a M3 x 30 screw and m3 nut to pull the two assemblies togeather