Most maneuvers are either movement maneuvers, static maneuvers or OB. If a MM, apply full penalty. Penalty is applied to OB at full or half at GM discretion. For example, a minor broken bone at -15 would be applied to all MM, to OB and maybe 1/2 or 0 to SM. Usually SM are lore checks or perception checks. If you think the pain of the wound should affect the mnv, the apply the penalty.