This is how they are meant to fit, note the cap that has the more upright cutout fits the inlet cam, the one with the cutout angled back fits the exhaust.
http://i13.photobucket.com/albums/a2...h2000/Belt.jpg
If you try and fit them differently they either won't fit or the timing will be wrong.
Sorry about the plug leads in the pic, as the photo was taken a while back.
You need to remove the 3rd cap from the right on each cam.