Dear Sir / Ma'm, as of now leave any such blank space in the admit card. Your date and day and slot of the examination is already mentioned in the admit card which is the most important. You can leave any such blank space as of now, and during the examination as per your invigilator instructs you, you do accordingly. Or you can also ask your invigilator as to what you have to fill in there. If it is required to be filled from the beginning, then at the time of entry in the examination hall during the documents checking, the authorities will instruct you what to do.