Shimano REVOSHIFT SL-RV100 Instruction Manual page 21

Maintenance
Replacing the inner cable
2. Pull out the inner head and remove the inner cable.
Use a sharp tool, etc. to pull out the inner head.
Inner head
3. Insert a new inner cable into the hole.
Inner cable
4. Pass the inner cable through the bracket, and out from the stopper area of the outer casing.
Outer casing stopper area
Inner cable
21