The dropper cable kit contains the parts needed to link the remote to the dropper.
Universal Dropper Cable Kit
The cable kit contains the parts needed for all Thomson Dropper posts. For older external units where the cable ball end is located at the remote, use the ball washer at the cable end. For Covert posts, and external droppers with the cable end at the cam lever near the saddle, omit the ball washer.
No, remotes can be found here: