Take your AM1 front fork and one of the disc brake callipers. Note: both front and rear callipers are identical. You will also need the 5mm hex key.
Loosen and remove the two bolts on the side of the calliper as shown in the image above.
When you have removed the two bolts, set them aside and pick up your AM1 fork.
The calliper attaches to the INSIDE of the fork. The mounting holes in the fork will line up perfectly with the two bolt holes on the calliper. The barrel adjuster (circled) will be pointing upwards.
Line up as shown.
Carefully place the two bolts through the bolt holes in the fork and screw into the mounting bracket on the calliper as shown and tighten with the 5mm hex key.