Attached is the Quick Setup Guide for setting up your Docking Station.
You should only proceed with disconnecting your old Desktop/iMac and setting up the new equipment in your primary work location IF you no longer need access to the old equipment (if you don't use Remote Desktop/realVNC/login to the old machine directly, and thus work exclusively on the new laptop).
This video goes into more detail for Windows Users - https://www.youtube.com/watch?v=tPwTzUp6djI
The quick setup guide may be sufficient, but if you have questions, the Dell Dock Setup Video may address them.
Ignore any references to black vs gray laptop models in the video, and please note that most people only have one monitor to worry about.
If you encounter issues with the setup process, please submit a ticket to JHUP_IT_SUPPORT@jh.edu to request assistance.