The beginning of that DIY is misleading and, frankly, makes no sense.
"Here's a DIY I threw together demonstrating how to swap out the adaptive headlight bulbs. These are the H3 bulbs for the headlights that engage and swivel when the steering wheel is turned."
Cornering bulbs (the inside pair) do not swivel anywhere. Only the primary projectors (the outside pair) can swivel when the steering wheel is turned. Meanwhile the DIY at the link is actually for the cornering bulbs.