Here's the install pictures for the invisihitch on my 2012 M-Sport. Along with the Yakima Full Swing bike rack and Hitchski. Holds up to 4 bikes or 4 snowboards/pairs of skis with the Hitchski. Probably exactly what you're looking for. The invisihitch is great and I've towed our LeMons car with the ball mount for it.
https://goo.gl/photos/f31XFVKVBnGSSyoD8