How to Enable/Disable 2 different Textures Simultaneously in the Parameter Groups?

I have 3 textures (Texture 1, Texture 2 and a Alpha mask texture for blending Texture 2 on top of Texture 1)
but I need to have a switch on the Parameter Groups that enables/disables the Texture 2 and the Alpha Mask Texture simultaneously, how to do that?
1:6312-
Best Regards

I have figure it out! :wink:

I just placed the switch in front of the Lerp

here:

Regards