This integration is available with a Workable Pro or Enterprise plan, however, you can still post to Totaljobs through Workable without setting up this integration.
To setup the integration, login to Workable and click your profile icon in the upper right to access the Integrations section (you must be a Super Admin to do this).
Click on Totaljobs and enter your Totaljobs account info and contact details. Then click Update Settings and the integration will be complete.
You'll now be able to use your Totaljobs account to post through Workable. In the Find Candidates step of the job editor, click on Premium Job Boards and there will be an option to use your Totaljobs recruiter account to post.