Using a Shift Register PCB you mean Sokol ? why would it be any different than hooking it to a Leonardo? I am not sure I understand 100% cos I am sure you know this :


GND ---- Any Available GND Pin
SCK ---- Pin B1
CS ------ Any Available Pin--Assign in MMjoy
DATA --- (MISO) Pin B3 if available but can use any available Digital Pin... eg if TLE5010 PCB are using Miso (avoid Pin13 or LED will Flash constantly with data flow)
VCC --- 5v Power ( On the Leonardo I use Vin too as Vin voltage = input voltage ie 5v from USB)