Motherboard has one 3pin chassis connector

Solution
Internal I/O Connectors

- 1 x 24-pin ATX main power connector
- 1 x 8-pin ATX 12V power connector
- 6 x SATA 6Gb/s connectors
- 2 x USB 2.0 connectors (supports additional 4 USB 2.0 ports)
- 1 x USB 3.1 Gen1 connector (supports additional 2 USB 3.1 Gen1 ports)
- 1 x 4-pin CPU fan connector
- 1 x 4-pin system fan connector
- 1 x Front panel audio connector
- 2 x Front panel connectors
- 1 x Chassis Intrusion connector
- 1 x Serial Port connector
- 1 x Clear CMOS jumper

there should be two 4 pin fan connectors one for the cpu one for the case fan. if you have two case fans you can buy a y splitter but you lose fan control. if you have more then two fans and want to slow or speed them up buy a fan controller for one of the drive bays,.
Internal I/O Connectors

- 1 x 24-pin ATX main power connector
- 1 x 8-pin ATX 12V power connector
- 6 x SATA 6Gb/s connectors
- 2 x USB 2.0 connectors (supports additional 4 USB 2.0 ports)
- 1 x USB 3.1 Gen1 connector (supports additional 2 USB 3.1 Gen1 ports)
- 1 x 4-pin CPU fan connector
- 1 x 4-pin system fan connector
- 1 x Front panel audio connector
- 2 x Front panel connectors
- 1 x Chassis Intrusion connector
- 1 x Serial Port connector
- 1 x Clear CMOS jumper

there should be two 4 pin fan connectors one for the cpu one for the case fan. if you have two case fans you can buy a y splitter but you lose fan control. if you have more then two fans and want to slow or speed them up buy a fan controller for one of the drive bays,.
 
Solution