Step 3: The Laces pt. 2
The ankle strap is mounted pretty much the same way as the lower laces. The ankle strap runs the opposite way of the other straps, to put some counter-force on the servos when they put the laces under tension.
I put a small martini shaker into the shoe to act as a foot analog, so I could make strap adjustments and such. You want to be able to get your foot easily into the shoe, and visually the tightening laces look better if they have a lot of slack.