3 phase transformer with changeable vector group

Hello,

I'm trying to build a more or less ideal 3 phase transformer model. I want to specify a vector group, energize different windings and measure the voltages at the secondary terminals. I want to write a script which switches between different vector groups automatically so the vector group has to be changeable from the workspace. I found the "Three-Phase Transformer (Two Windings)" simulink block. But the problem is

1. I can't select Y6 or D5 winding configuration. So I can't build all vector groups
2. I can't figure out how to change the vector group from the workspace because there is only a drop down menu for the winding configuration. Is there any way to change the winding configuration from workspace?

Did anyone of you already faced the problem and solved it?

Thanks! :)