Steering Tie Rod With Ends - All Questions

I asked a question earlier today and the question was incorrectly understood. I intend replacing both steering tie rods on my mk1 golf cab. Looking at the drawing of the steering rack between the tie rod and the steering rack boot shows a “locknut” with 2 flat sided which fits on the steering rack, one for either side. Are these “locknuts” required when these new tie rod parts are used?