Slow Six is right--the valve as installed has the cable pull to the rear; the valve will have to be rotated 180d to direct pull.
Was looking at doing just that soon, but my old cable is still working, just as hard as it was 7 years ago when I got the trailer.
2015 38RSSA #7382
2005 TK3 #1869, 10 yrs of memories
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired