Use mask parameters instead of block parameters in real time target

I've created a subsystem that generates a combination of sinusoids that has a fixed amplitude and bias. I've used sine wave blocks to do this. I've added a mask that takes the total amplitude, individual frequencies and the bias. This enables me to enter 5 parameters on one pane instead of three different panes.

This arrangement works fine in Simulink, but when I download it to slrt, I no longer see the mask parameters, but the parameters of the individual sine blocks. Is there a way to preserve the mask on the subsystem when I download it to the target?

Thanks in advance for any help,

Harsh