The remaining fan headers on the motherboard should be CHA_FAN, PUMP, or M.2. These can be used for various parts, depending ...
The ASRock B650E Taichi Lite provides: 1 x CPU Fan Connector (4-pin) 1 x CPU/Water Pump Fan Connector (4-pin ... one is at the top-right corner of the motherboard (CHA_Fan1/WP).