I took a lead from someone else on the forum when I install the EMS in my Legacy. Bought two 50A range cords and two 50A range outlets. Disconnected the shore line at the ATS, then wired back into the ATS with one if the range cords. Took the shore cord and put one of the outlets on the end of it. Then used the second range cord on the shore side of the EMS and, using a piece of extra cable from one if the range cords, wired the other outlet on the coach side of the EMS. Plug it all in and your ready to go. If there's a problem with the EMS, you can remove and bypass it (without opening the EMS case). Also, you can easily remove the entire shore cord if needed. Pretty slick if I may say so myself. Got everything (EMS, range cords and outlets) from Amazon.
2015 Legacy SR340 360RB
2014 Jeep Wrangler Unlimited Toad
Gigi, Poppy and Sadie Lady...On the road, but not full time!