You probably do not have the pivot arm in the left side case where the bucking bar is actuated from positioned properly, and have it in 180 degrees reversed from how it should be in there...lol....You need to release the cable from the actuator arm at this point, then take off the left side clutch/bucking bar cover pullout that mechanism straight out of the case cover and put it back in so it looks like the bar that the cable goes into is facing away from the motor...It should only go in one of two ways and it is the opposite of what it should be right now.
After that you should be able to push in that bar towards the motor and feel resistance in doing so...You then want to push that bar towrds the motor again perpendicular to the motor and attach the cable again...It should look like this.
View attachment 171848