Wordpress CF7 how to send custom value from request page?

Question

WordPress

Good afternoon everyone.
There is a site made on Wordpress. This site has the Contact Form 7 plugin installed to send messages from the site.
Also on the site there is a page - the master plan of the village. Depending on the selected site, a div block pops up with information about the selected site with a button "Submit a request for this site", when clicked, the CF7 form for submitting an application opens (Name, phone number and site number).
Can you tell me how can I make the field "Lot Number" automatically filled in?
In the pop-up information window, the given "Lot number" value is wrapped in h4 with the value id="nomer_uch"
All information about the parcels is taken from the database.
How difficult will it be?
PS I don’t really rummage in programming, if it’s not difficult, then tell me the code
Thank you in advance

Answer 1

In JS, when you click on a site, you get its number or ID, and when filling out the form, replace the value of the Plot number field with this ID.