They are supposed to be tight.

For the outside one the Head of the Timing Chain Crimping Tool has a position for pushing the last Oval Link on. It is the sidethat has a tiny Magnet built into it.

I am not sure how you get the inside Links started and I cannot easily visualize it.

I am going to speculate that you flip the 2 links facing the Radiator to the Side and install the Master Link. Use the proper Head on the too to press the center Oval Link onto the Master Link Shafts flush to the Oval Link Face.
You gently pull the Master Link back and than flip the 2 sides of the other links in front of it with its Rollers and find some way to press the Master Link on through the other links.
I have not used the tool so I don't know if the Tool has enough adustment to open up enough to push the link like that.
One the Master Link is pushed through use the Proper Head position to install the outer line and the reposition the Head to crimp.
The above stuff is speculation on My part but I have the Crimping Tools that I have examined and a New Timing Chain that I never installed bacause the Original is OK. And, both are boxed up and store for several years so I have not seen either of them for that time.

__________________
84 300D, 82 Volvo 244Gl Diesel