(dropout mount with strip metal bracket)
(rack mount mount)
(brazed on mount up a little ways from the dropout)
(canti post mount; this one is on the fork, but a canti post mount is a canti post mount whether or not it's on the front or on the back of the bicycle.)
The first two have the wiring run inside the frame, the last two have the wiring elegantly ziptied to the frame (the third is going to have the wiring routed inside the frame after I run it on a couple of longer rides this weekend/monday and can strip it down for painting; the forth is my xtracycle so the frame is going to be replaced in the next month or so.)
-david parsons