Winjet 2010-2012 & 2013-2014 Legacy fog light kit NOW AVAILABLE!
For wiring kit and switch install you may refer to this WRX Winjet kit install:
Should be fairly similar
'15 WRX & STI steering wheel are a direct swap for 12-14 Legacy
Tutorial: http://www.subaruforester.org/vbulletin/f77/tutorial-2015-sti-wrx-steering-wheel-into-forester-sj-371425/#/forumsite/20556