i marked original position of steerer
nice! the new steerer seem to be an older version with threaded holes but - and this is a sign of good quality - with thread insert from steel (emhart.com/brands/heli-coil)
but its a logic simplification in design terms to use screw nuts istead…
fix new steerer on same position
and finally glue again with epoxy the handlebar (after sanding and cleaning)
screws back in for right positioning
next step is to change all Bowden because they seem original and the cover is broken
specially the areas around the balljoint (and i like to have teflon bowden for better performance…)