so intead of a front to back wishbone it will be transvere and go right to left.Run the single point side of the wishbone to the housing, the double ended sided to the chassis.
the diagonal bar/wishbone runs under the TQ arm. I cant run Rear coil overs with the pan hard bar in the stock location.I'm trying to picture how your going to do a diagonal link since you have a torque arm and I can't see how its going to work/fit. Even a wishbone would be tough to fit that car with stock suspension. Whats wrong with the panhard rod?
Hook the wide part of the wishbone to the rear end brackets then put the slider to the cross member in the center in front of it works great with ladder bars or in your case run them to the lower control arm bolts. We call it a reverse because a lot of guys run the wide part to the front and the slider on the center of the rearend housing