When using BQ76PL536A only with 4 cells, what should the ALERT_N, CONV_N, CS_N, DRDY_N, FAULT_N, SCLK_N, SDI_N, SDO_N and ALERT_S, CONV_S, CS_S, DRDY_S, FAULT_S, SCLK_S, SDI_N, SDO_S pins be connected to? Should the _N pins be connected to the pack positive input, and should the _S pins be connected to ground? Is there a reference schematic I can use?