Child component to AudioProcessor

Sorry to bother again but I'm stuck on something probably quite simple but I can't figure it out.

I put a series of buttons inside a parent component in a separate .ccp/.h file. How can I let those buttons change the parameters that I have in AudioProcessor?

When I put the buttons in PluginEditor, I can do something like this:

void NewProjectProcessorEditor::buttonClicked(Button* activeButton)
    if (activeButton == &button1)
        audioProcessor->setParameterNotifyingHost(NewProjectAudioProcessor::Params::Button1, button1.getToggleState());

But now I'm not sure what should I do in the component I created with the buttons to control the parameters of my plugin.

Thanks in advance.