meter readings

Hi I have a day time and night time reading to submit for my electricity as I am on economy 7 but there is only one slot not two for readings, where do I put my second reading ?

@denpa please can you let us know the serial number? The info we received from Co-Op is for a single rate meter, so we may have the incorrect one. Please could you send a photo of meter to help@bulb.co.uk.