@kareem_fr Dupe histone grp along with coils you are joining up. After joined and dsDNA made, roughly put 3 strand mounts around each coil. Make locator, point contrain it to one mount, then aim/up contrain it to the other two. Parent histone group to that locator (keep offset).
@kareem_fr getting the histone 'some to follow, ...you'd want to use strand mounts. Three of them around the coil, which you can then use an aim constraint with (origin/aim/up), to get a perfect tranfsorm frame. You parent your histones under that. Do this b4 duplicating your coils.