how can I find the SDI II Transceiver reconfiguration register(address = 0x0E)

I'm using a chip C5GXFC5F6M11C6 to make a FPGA design With SDI II IP.

In order to implement reconfiguration management(user logic), I reference the SDI II example design which is generated when I parameterized the SDI II Intel FPGA IP core and checked the "Generate Example Design" option.

In the example design there is a sdi_ii_reconfig_logic.v for reconfiguration management.

And in the sdi_ii_reconfig_logic.v file there is a in the "SET_OFFSET" state and the "wdata <= reg_offset;" is for write a offset value 0x0000000E("RX_OFFSET_M_L_COUNTER = 4'he") to Transceiver Reconfiguariton Controller.

In [SDI II Intel® FPGA IP User Guide] I foud the information as attached picture image, The offset 0X0000000E is a address point to a register in the transceiver.

I searched the 「V-Series Transceiver PHY IP Core User Guide」and 「Cyclone V Device Handbook Volume 2: Transceivers」, But I didn't find a register description which address is 0X0000000E.

Could you teach me how can I find this register description?