Like Velocio said - make a little loop of twine or thin cable, stick it into the hole by the stem, then thread your inner through the lever hole until it goes through the loop of twine, then pull on the loop to pull the inner cable out of the hole. Then you can push the outer cable over the inner.
Like Velocio said - make a little loop of twine or thin cable, stick it into the hole by the stem, then thread your inner through the lever hole until it goes through the loop of twine, then pull on the loop to pull the inner cable out of the hole. Then you can push the outer cable over the inner.