Finetuning HSTS on Nextcloud

Due to the warning
"The “Strict-Transport-Security” HTTP header is not configured…"
I added my conf file with the following lines:

<VirtualHost *:443>

Header always set Strict-Transport-Security “max-age=15552000; includeSubDomains”

On I read the tip to add “; preload”. Do I add this before or after the quote?
Header always set Strict-Transport-Security "max-age=15552000; includeSubDomains; preload"
Header always set Strict-Transport-Security “max-age=15552000; includeSubDomains”; preload


should work…

Ok, I didn’t tell that I visited that website already.
On that website I got two replies:

Error: subdomain is a subdomain. Please preload instead. (Due to the size of the preload list and the behaviour of cookies across subdomains, we only accept automated preload list submissions of whole registered domains.)

Error: No HSTS header
Response error: No HSTS header is present on the response.

( is fake in this topic. I am using my real domain name)