the original MII suspensions that were using the original narrow stamped steel lower control arm from the car used a strut to locate the control arm in a fore to aft configuration. like the radius arm does on a for twin I beam truck. this is because the control arm has a narrow fottprint at the inner end, unlike the newer aftermarket MII setups that use a wider mount on the inner end. the rod that would bolt onto the control arm near the ball joint end would end at the frame behind the cross member on each side with a flexible style joint to allow the arm to fles some as the suspension moves up and down. google images will have a better explanation since a picture says a thousand words.
here is a quick diagram from an instruction sheet I found online that shows it.
https://www.classicperform.com/Instr...-48-Ford-2.htm