Rear tie rods - what's the function?

I just replaced the suspension on my wife's '03 Navigator. Hate to sound like a complete green behind ears kinda guy but anybody wanna share the point of having tie rods connected to the rear spindles on the REAR IRS system? The thing doesn't have rear wheel steering or anything so I'm kinda confused as to what the point is.

Adjust toe.

I assume they're for adjusting the toe.

edit - Dusterbd13 beat me to it.

Dusterbd13 wrote: Adjust toe.

Feel pretty stupid now.

Nothing to see here, move along.

Adjust individual rear toe and Thrust Line/Angle

Adjust it front and back just so and you can crab walk that "stinkoln masturbator" down a freeway. Lol.

Also for increased toe stiffness, compared to an N-shaped lower wishbone.

I like separate toe links. I wish our -13 FSAE car had them. With a wider rear toe base and a new rather than 10 year old main power wire we'd have won.

Aside from stiffness and adjustability - it also makes it possible to use the same knuckles and control arms front and rear so bean counters love 'em too.