I do not have a diagram for you, but here is how you’d connect them up:
GND, VCC – shared with all LED Rings
ENCA, ENCB, SWITCH – each LED Ring will need dedicated lines for these to the Arduino
CLK, LE, and OE – these signals can be shared with all LED Rings (three lines, no matter how many LED Rings)
SDI and SDO: you will ‘daisy chain’ these together. The first LED Ring will receive its SDI input from the Arduino. You will then connect the first LED Ring’s SDO output pin to the next LED Ring’s SDI pin. You will keep chaining SDO to the next LED Rings SDI pin.
Hope this helps. Let me know if there’s anything else I can help you with!