The chains are, I think, part of the larger set, the full set for the jagdpanther, which I have. Going by it's instructions this gives the following:
You might have forgotten the small circle (under the vent in the center near the hammer).
The 16 chains (2x8) are used to keep the horseshoe-shaped thingies on tn their pins, and the spare tacklinks in place (marked V). The ones marked VIII might be used for keeping the towing-cables in place on the rear deck and the toll normally stored right above the hammer and crow-bar if stored on the side.
Part VI is used as a chain for holding the plug used when the machinegun was removed from the ballmount.
To see for yourself:
Aber-site. For the instructions, go to instructions, then plates. It is set 35028.
Hope this helps,
Harm