Q: I just need a guide on how to replace shift cables

Hi there. I will have difficulty in explaining the exact procedure as you have not provided a vehicle model. Generally, the shifter is connected to a linkage either below the shift boot or under the vehicle. Follow the length of the cable and inspect the fasteners too and replace them if necessary. Consider purchasing a service manual specific to your vehicle for a guide. Alternatively, if you would like to have this done for you, then have a certified technician from YourMechanic perform the shift cable replacement at your home or office.