Checkbox witout label with value

Hi,

For an car repair website i need some checkboxes around the image of an car so the visitor of the website can select some “places” where the car has damage. In the e-mail i need an image with numbers. These numbers corespond with the locations of the checkboxes. All the checkboxes need to have a number as value for the mail.

I have this almost done but i have 1 problem with it.
I can make the textboxes around the image and i use the pipe (|) for splitting the label from the value.

When i do this [checkbox li-achter ” |9, “] or [checkbox li-achter “|9, “], the value is allways or never displayed in the mail. (ignores the selection)

When i do this [checkbox li-achter “.|9, “] it works perfect but then the label is not empty. Is there a way to fix this?

https://ww.wp.xz.cn/plugins/contact-form-7/