Click on the Take Me To 
node under your MyMaps MapSource entry.
To add a new Take Me To layer right click on the TakeMeTo icon and select Add TakeMeTo Location.
To change an entry, select it from the list.
Name
This is the description shown to the user e.g.
Layer Name
Select the Layer Name that will be turned on when the Take Me To link is selected.
Easting
This is the Easting (X) co-ordinate to be displayed as the centre point of the map.
Northing
This is the Northing (Y) co-ordinate to be displayed as the centre point of the map.
Zoom
This is the Zoom scale to display for the map when the location has been found. Bear in mind this can be restricted by the scales / resolutions set by the chosen base mapping.