Ben, If you don't want to release the cable anchor screws at the derailleurs FB's second paragraph is the way to go. Just trim with a razor blade the junction of the handle bar and the bar end.
There are three different styles used to dress the shifter cable from the shifters... classic (under wrap to first bend, see pic), bare (no cable housing under the wrap) and with the cable housing wrapped to near the stem (like an Ergo shifter).
Brad