Struggling to Achieve Balance

I have a Sky-Watcher HEQ-5 Pro mount and an Svbony 80mm ED refractor. I have accumulated a remarkable number of add-ons that I attach to the refractor: ZWO Off-Axis Guider with ZWO ASI120MM guide camera, ZWO Electronic Auto Focuser, ZWO ASI1600MM camera, and a ZWO Electronic Filter Wheel. With all that gear added on, the tiny little dove plate that came with the telescope proves to be far too short, but while I have bought a longer dove plate, it seems that I cannot quite figure out how to attach it to my refractor. Is there a trick to this that I am being too dense to figure out??