Selenium IDE Chrome Extension-Inserting generated random DOB into fields

I've worked out how to generate the dates I need, but I'm not sure how to insert these into the fields I need them to go in on the webpage.

I'm trying the below but it's not inputting the number generated

Command= type
Target= (page field reference i.e. DD digits)
Value= ${myRandomNumber}

Also, as I'm generating day, month and year separately, will I need to annotate myRandomNumber somehow so that it's referencing the correct one, or will it always reference the last one generated?

Thanks