Use of User App Real Time Data in PLC Project

Hello,

real time data of an user app can be provided for example with the example c++ "datalayer.realtime" of the ctrlX AUTOMATION SDK to the ctrlX Data Layer:

It is also possible to read this data layer nodes with the RealTime_Data node into an PLC project with PLC Engineering:

But here now starts my actual question: How can I use this variables now inside my PLC project? I do not have a possibility to map the variables (var1, var2,...) to PLC variables like it is possible with the real time nodes under the EtherCAT master:

Could you please provide an example (PLC project and snap with source code, which provides real time data) to get an idea of how this works?

Thanks in advanced!

Maurus