SUM & transport directory other than /usr/sap/trans

Hello experts,

there are 2 systems with different transport directory on the same host.

the systems have different product systems and therefore they can not have the same transport directory.

I noticed SUM does not like a transport directory other than /usr/sap/trans, for example /usr/sap/trans<sid>

I tried to copy one system to another host without creating directory /usr/sap/trans but only /usr/sap/trans<sid>

in such case SUM informs me that it is impossible to extract *.SAR files as it can not find /usr/sap/trans/EPS/in

I am confused. What shall I do in such case?

Should I create empty /usr/sap/trans with subdirectories

or should I rename /usr/sap/trans<sid> to /usr/sap/trans and change TMS properties?

Regards, Evgeniy