Depending on the model, the overtravel adjustment screw is usually in the trigger and an allen wrench is used to adjust. If there is no allen screw visible in the trigger then it may not have an overtravel stop.
There is no pre-travel adjustment on the 945, only over-travel. Screw down the allen screw in the trigger till the hammer fails to fall, then from the fall/no fall point back off a 1/4 turn. Some 1911 triggers allow for pre-travel but the 945 is a hybrid and I'm not sure 1911 triggers fit them.