Hey, I've been trying to setup an off-camera flash with my Altura speedlight (full kit with remote and trigger), but I can't find the settings on my Nikon D3300 to make it the "commander." I've attached the trigger to the hotshoe of my camera, and I've attached the remote to my speedlight. But when I take a photo, the flash is not triggered. I have options for "channels" on my speedlight (S1, S2, M, etc.), but I can't find the settings on my camera to sync it. I've watched online tutorials, but they have not been helpful for my camera style (telling me to select options that my camera doesn't have). How can I do this with my particular camera model? Please help!