Uhaul Corvallis: (541) 757-7655; Mon-Thur: 7 am - 7 pm; Fri: 7 am - 8 pm; Sat: 7 am - 7 pm; Sun: 9 am - 5 pm
http://www.uhaul.com/Locations/Trailer-Hitches-near-Corvallis-OR-97330/700045/
subaru outback trailer wiring
https://www.etrailer.com/t1-2008_Subaru_Outback%20Wagon.htm
https://www.etrailer.com/tv-intall-trailer-wiring-harness-2015-subaru-outback-wagon-c56040.aspx
When you run the dedicated 12 power wire from the battery I recommend you run an additional wire that could be used for an electric brake controller wire. May not be needed now but an easy thing to do now and you never know what is in your future. Use #12 or #10 wires I used #10 when I did my 2012 Outback.