The answers as given in case you were wondering RLW are on the combat charts themselves.
You'll see that in the AT fire section it shows that on a result of 10-12 the target loses a step and the surviving step (if any) takes a M2 check.
On the direct fire chart it shows that an X result as well as removing a step (and a transport) causes an M2 check to all other units in the hex and an M check to any closed top AFV's in the hex.