Nipype SelectFiles Node connection to multiple Nodes

I’m a beginner to nipype and I’m currently developing a pipeline to do some preprocessing, I’ve looked at all the tutorials but still I have a problem with the output connection of SelectFiles. My node is selecting some different types of file (structural, functional, warps …) and I want to connect only some of the selected files, let’s say the structural, to one node (for example BET) while some other files to another node (e.g. functional to coregistration). How can I do this when connecting the nodes in the workflow?THnaks !