Mk
5:4b ... and the chains had been torn apart by him, ...

The second phrase has these 6 narrator words ... kai diespasthai hup autou tas aluseis, (and had been torn apart by him the chains, ...).
The 6 narrator words are top down. The 2 words "hup autou" (by him) are tangent to the demoniac. The 2 words "tas aluseis" (the chains) are tangent to the eight broken links of "the chains."
This is another flashback diagram that shows the demoniac at some time in the past just after he has broken free from the chains. The next phrase will deal with the fetters on his feet.
5:04a < Verse > 5:04c