HOw to Sync FTDX5000 VFO-B for split operation

[JN7FAH]

Hello folks,
I am using SDRC V3.2 as a remote panadaptor.
In the remote shack, I connect RSP-1A to IF output of FTDX5000 and run the SDRC server on a server PC.
On the client side, I can use SDRC as Panadaptor syncronizing VFO-A of FTDX5000 via OmniRIG 1.2.
I can also use the CWSkimmer remotely. Once I click a certain frequncy on the band map of CWSkimmer, the RX frequncy of SDRC and the VFO-A of FTDX5000 synchronize the clicked frequency. Up to this point it works perfectly.
However, I can't synchronize the RX freq. of SDRC and VFO-B of FTDX5000 to the clicked freq, so far.
As a compromise to work DX by split, I have to operate as follows:
Set FTDX5000 split
Set VFO-A to TX
Set VFO-B to RX where I receive the DX station.

Does anyone tell me how to synchronize the SDRC RX frequency to the VFO-B of the FTDX5000?

Ken JN’FAH