Zipper Lines

I know how I solve this puzzle, but it’s fun wondering how others will. Top to bottom? Left to Right? Odd-numbered boxes first? Alphabetically? Any order that leads to the fully-zipped puzzle is great.

These Zipper lines, like most Zipper lines, are made up of pairs, with or without a center digit. Unlike most Zipper lines, each is one of a kind. Not just in which pairs make up the line’s value in which order, but in the values themselves.