JBtek All Black Sleeved PWM Fan Splitter Cable 1 to 2 Converter, 2 Pack https://www.amazon.com/dp/B01EF9OI0O/ref=cm_sw_r_apan_glt_i_BPFESZZAYMXKGJFCQGGG?_encoding=UTF8&psc=1

Noctua NA-SYC1, 4 Pin Y-Cables for PC Fans (Black) https://www.amazon.com/dp/B00KG8K5CY/ref=cm_sw_r_apan_glt_i_N6BT6RH4JDKKRMTD4V5C?_encoding=UTF8&psc=1