Datapump: Include Port number as an argument to DPDirect process command line

Datapump main process is DPDirect. Two of the arguments are source and destination SQL Services to pump data from one SQL to the other. The most common syntax uses to be like:

DPdirect -i 40 -S :MS:<SrcHistorical>\OASYSHDB -D <system>:MS:<DstHistorical>\OASYSHDB -Z DPdirect_<DBName>_<system>.log -C DPGroup = '<groupName>'

The connection initially goes to 1433 port on destination to resolve the current port in which the instance is listening, usually 20010, and then the connection is established.
For cyber security reasons, standard SQL port 1433 uses to be closed on most of the systems so, in order to make it work, the destination port 20010 must be specified in some way.
Other related applications, like DPutil allows including the port number in the command line, as an example:

dputil -K -S <HistoricalSrv>,20010\OASYSHDB

But using DPDirect, this syntax is not accepted.
Is there any special way to specify the port number or simply is not accepted?
The way to solve this issue has been creating aliases for the source and the destination server instances, following MS directions:
https://learn.microsoft.com/en-us/sql/database-engine/configure-windows/create-or-delete-a-server-alias-for-use-by-a-client?view=sql-server-ver16

But it would be great if this port argument is included on DPDirect in same way as the other DPump related applications.
Thank you so much in advance