I guess better late than never! I didn't want to butcher my wiring and I didn't know what harness mitsubishi cars used that would work with my Mirage so I never got trailer wiring. I just did a search and of course there is a plug and play kit... DOH! CURT 56223 is the adapter kit to allow a 4 wire trailer harness to be used.
I found one on ebay for $35 shipped cheapest... 2 minutes searching online I found one here...
https://jet.com/product/Curt-56223-T...b86116765720a4
for $35 with free shipping, BUT first time buyers get 20% off first order so I ended up paying under $28 shipped! Can't wait to hook up my little trailer again!