DS250DF810: Confirmation of channel configuration and interface correspondence for retimer

Tool/software:

Hi Teams,

Please help confirm the correspondence between the "retimer channel" and "interface";thanks.

The interface used by the customer is shown in the figure:

Register definition:

Question: What are the corresponding channel numbers for the RX and TX interface hardware numbers used by the customer?

In addition, there are designs using DS250DF810（D16）+D2250DF230(D26)，

The same question applies: What are the corresponding channel numbers for the RX and TX interface hardware numbers of D26 and D16 used by the customer?
Also, please provide the register manuals for these retimers and confirm if all channel configurations are FC registers;