If the cable housing is properly seated in the ferrule and the ferrule is seated in the lever you should be able to get the cable to insert into the housing. Use a small flash light (penlight) and tie the levers down to get a good view of the ferrule within the lever you should be able to feed the cable. If it doesn't go in easily insert the cable through the lever cable stop and using the flash light feed the end of the cable into the housing (takes some patience). when you are successful carefully pull the cable through and take care not to crimp the cable when pulling the cable past the lever cable end stop. Good luck.