Full points for a server object are awarded if it is completely inside the correct connection slot. Completely is defined by: ““Completely” means that the game object is only touching the corresponding area (not including the black lines).”
Addition: The rules explicitly say “black lines”, because in the past lines were mostly black. Nevertheless this applies to all lines around areas, that are relevant to score points.
If an object only touches the correct area and other parts of the object (in this case the loop) is in the air (and not touching anything), full points will be awarded. One example for such a situation can be seen in the following photo (where the loop is not touching the mat).