It can be done without straps, I've never needed any, put the arb loosely in the tca, just put nut on 1 turn, connect arb to the chassis mounts, now use a jack and slowly lift the tca, you will find a position where it is closest to the inner hole, medium size strong screwdriver in hole to align, bash in with hammer if needed to help tca home, the last side will be hardest as the arb works against you, I did try leaving the arb unattached at the arb clamps but was no easier, so do it as above.
Don't know how many sets I've done but not a strap in sight, but if you find it easier with one use one.
tabetha