The Dell D6000 Dock has been issued only through September, primarily for those with a Lenovo Mix Tablet as it works with those, and other Dell docks do not.
If you have had your Lenovo Mix Tablet replaced with a Dell laptop, you can use the same dock, following the detail in the video below.

This video shows you how to connect in your accessories, connect your tablet and adjust your display settings.

If after watching the video you believe you are missing some cables or adaptors, complete this form to alert ICT. 
Please note you must be using a corporate computer to complete this form (you need to be logged in).
Link: https://forms.office.com/r/vQktyVPK22