Modifier conundrum

I am attempting to find a way to create a modifier button on my Orbweaver Chroma (running synapse2), that will change the 12 side buttons on my Naga Trinity(running synapse3). I am very new to Razer products and still tinkering/ learning BOTH synapse programs at the same time. Is this even possible? I was hoping that, at the least, I could create a button on my NON Razer keyboard that would serve as a modifier to the Naga buttons, and then just map one of the Orbweaver keys to that keyboard button. Any and all help appreciated.