PCG Scatter different meshes on mesh

Hi everybody. I’m trying to make a simple PCG tool that scatter multiple meshes on the surface of one start mesh. What’s the problem. I wanna control the trasformation of every type of mesh. And to do it I need a structure to control the value directly in viewport. Right now I can’t make it work because the transform point can’t take multiple values, so I try with a loop (as the photos shows) but no success. Don’y know why. I’m starting to give up.