Need to remove the cable from the 105 flight deck

This really depends on what cable you need to replace, the brake or the shifter.

For Shifter:
1. Shift the all the way down to the lowest gear using the small inside shift level for both the front or rear.
2.Disconnect the cable from the derailluer, likely a 5mm allen wrench will be needed.
3.Pull housing away from the shifter exposing the cable where it enters the shifter.
4.Compress the brake lever, this will expose a small hole on the inside of the shifter where the cable head is seated. For the right shifter the hole will be on the right, for the left shifter the hole will be on the left.
5. Push the cable in from where the cable entered the shifter. The head of the cable will now be exposed.
6.Pull the cable the rest of the way out of the shifter.
7.Install the new cable.

For Brake:

1. Disconnect the brake cable, likely with a 5 mm allen wrench.
2. Compress the brake lever. Keep it compressed until step 5.
3.Look straight in from the front of the bike, you will see the head of the brake cable.
4.Push the cable out of the shifter from the exposed area of the cable, then pull once you can reach the end of the cable.
5.Install a new cable.

Depending on the reason you have removed the cable, it is advised that you also replace the housing in most cases. For the shift cables this is not a problem, however, for the brake cables you will have to untape the bars to access the housing.

I hope this anwsers your question. Thank you