Go to https://www.minorplanetcenter.net/data "Observers" and "Ephemeris Service"

enter the name or number designation of the object e.g. Kleopatra in the form (you can also enter 216)
scroll down and select "MPC1-line" and then "Get ephemerides/HTML page"
a text file will be downloaded to you.
Open the text file in any text editor and copy the entire single line

Paste this line into the telescope 'Comets/NEO' page

save the plan and make a reservation.