-Disconnect the battery
-Mark with a pen/marker the outline of the CAS that is already fitted
-Undo the plug on the harness then 2 bolts holding the CAS on the head
-Slide out, making sure you you see which side the alignment dowel/pin thingee is on, as it can be installed 180° out
-Slide in until it fits on to the cam, then put the 2x bolts back on but not tight
-Line up with previous timing marks, tighten bolts
-Plug in, battery on, check for leaks (and that it works) and you're done :thumbsup: