a 80/120mmmm can have :
1. Only one small 3 pin connector.
2. Only one 4 pin molex connector.
3. One 3 pin + 2 pin molex combo connector.
4. One small 3 pin connector and small 3 pin to molex converter cable.
koolent's method is applicable for Type 1 and if your mobo don't has any emty sys_fan connector ( or any other 3 pin fan connector header ) or else you don't need to worry too much about fan connectors.
1. Only one small 3 pin connector.
2. Only one 4 pin molex connector.
3. One 3 pin + 2 pin molex combo connector.
4. One small 3 pin connector and small 3 pin to molex converter cable.
koolent's method is applicable for Type 1 and if your mobo don't has any emty sys_fan connector ( or any other 3 pin fan connector header ) or else you don't need to worry too much about fan connectors.