Bitcoin Taproot Mutual Satisfaction Clause

Bookmaster Bitcoin 3rd Edition, 179 pages.

Mast and Scriptless Multisignatures make it easy to design mutual satisfaction clauses. Simply make one of the top leaves of the script tree a scriptless multi-signature between all stakeholders. In Figure 7-7, we have already seen complex contracts between several parties with simple mutual satisfaction clauses. You can further optimize it by switching from scripted multi-signature to scriptless multi-signature.

What are the mutual satisfaction clauses in Figure 7-7? thank you.