You need to create a new sequence object (conventionally called "LINK<xxx>")
with subsequences your 10 fragments. You will have to give these fragments
coordinates in the parent, which will automatically tie them together.
Subsequence FRAGMENT1 1 100000
Subsequence FRAGMENT2 100001 200000
Subsequence FRAGMENT3 200001 300000
You don't have to give DNA for the link. The subsequences can overlap, but
where they do so must agree exactly.