You know its illegal I assume?
A-frame is legal only to tow a broken down car to the nearest place of safety, ie first layby or non double yellow line road or whatever you pass from the point you broke down at.
As to how to fit, it depends on how high your car is, they go under the bottom wishbone so compared the height of that to the bottom of the bumper on your car, if its lowered or got a splitter you are likely to be out of luck.