"reverse connection"

Hello,
I have successfully activated a kit with eNB=Nova227 in NAT mode
and CPE=ID06 also in NAT mode.
It is installed in a private LAN (192.168.2.0) and works well, because any UE (PC) connected via ethernet to the CPE,
can ping any device on the LAN and navigate internet with browser via LAN gateway.

But a customer needs also initiate a TCP connection from a PC on the LAN (where stay the eNB),
to the network of the CPE (192.168.150.0), connecting a slave PC (192.168.150.12) on such subnet.

In eNodeB I see other LGW modes as Router and Bridge, but none of them seems solve the need of such “reverse connection”.
Can you advise the proper LGW mode and/or routing configuration to achieve this connection ?

Regards,
Marco