Toe link is a bar that runs from the stationary section of the frame. Its to adjust rear toe on IRS, but since this is a Jag style LCA set up it should not be necessary.
The LCA appears to be attached to the steering arm mount on the ATS spindle. If the LCA was designed with a lower ball joint then you would need a toe link to keep the spindle from rotating.
The builder is the best person to ask. He's knows what he is doing.
thanks 509...I type slow. LOL