There is a joint inside the gator at steering rack end that allows rod to move (just like there is a point where movement can occur in driveshaft, well 2, there is a joint on rod and can get worn) and the ball joint on the tre. It'll be one of the two causing the movement.
Yeah I ordered both. There is a rattle coming from the other side too, but I couldn't find any immediate play. But that's not to say it isn't there, I only took the N/S wheel off at lunch as I knew there was play on that side