How To Move the Complete Order Button to The Cart Summary Sidebar
In some jurisdictions it is legally required to place the Complete Order button beneath the totals. This is necessary to be legally compliant in Germany.
This adds the Complete Order button to the bottom of the cart summary sidebar, but it doesn't remove it from its default location. The best way to handle this is with CSS.
How to Move the Complete Order Button Below the Order Totals on Mobile
If you want to go a bit further than the default example, you can use this variation of the second block of code:
This is best paired with using this technique:
How to Center the Complete Order Button
To center the complete order button, just delete this line from the examples above: