Step 3:
Connect to the
SB Live! Card
Do not force the audio card into the slot. If it does not fit properly, gently remove it and try again.
Connect the dark grey flat cable to Sound Blaster Live!’s AUD_EXT header.
If you have difficulty connecting to the AUD_EXT header:
1.Remove the Sound Blaster Live! card from its PCI slot.
2.Connect the dark grey flat cable to Sound Blaster Live!’s AUD_EXT header.
3.Align the Sound Blaster Live! card with the vacant PCI expansion slot. Press the card gently and evenly into the slot as shown in Figure 5. Ensure that the card is seated firmly inside the PCI expansion slot.
4.Secure the card to the expansion slot with a screw.
ii.Fasten the card to the slot with a screw. 
Unused brackets
i. Gently press the audio card into the slot.
PCI slot 
ISA slot