I usually just hook my front straps to one of the holes in the control arms, and the rears I wrap around the rear trailing arm where the rear shock bolts in.
I prefer strapping it to the unsprung part, that way the suspension of the car can still work, and the straps won't loosen.
1992 BMW 325i (CHUMPCAR #296 - build in progress)
1992 3.0L M52 325i (ex-daily driver - track car only)
2002 330Ci (ex-daily driver - sold!)
Check out my e36 track car build