Combining numerical values with textual labels in checkboxes

I’m trying to use CF7 for building a personality quiz, so I need to present the users with multiple-choice questions, with every answer corresponding to a different type.

So ideally, I would like to have the user see the textual labels with various answers, whereas having the numerical indexes in the value field of every checkbox, so I could upon form submission run a javascript that calculates the total score for every type.

I have tried to use pipe for this end, but if I understand correctly, this mechanism only stores the actual values on the server-side, and in actual html prsesented on the user-side both values and labels are identical – is this correct?

If it is, is there any other way to specify different value for labels?

https://wordpress.org/plugins/contact-form-7/