The V2.2 board has only (Z-STEP and Z-DIR on PB3/PB4). The diagram reveals two parallel 4-pin JST ports labeled Z and Z2 . Important: These are wired in parallel, not independent.
(available upon request for 64‑pin LQFP mapping). Appendix B – PCB layout thermal image analysis (identifies hot spots: MP1584, bed MOSFET). Creality V2 2 Board Diagram