delay in the downloading page ext

hello
am tryng to change the download delay in the downloading page ext
I dont where to change this code:

“You can change the delay using the dlm_dp_automated_start_seconds filter.
An example on how to change the delay to 5 seconds:

function dlm_dp_change_downloading_page_delay( $seconds ) {
return 5; // change the delay to 5 seconds
}

add_filter( ‘dlm_dp_automated_start_seconds’, ‘dlm_dp_change_downloading_page_delay’ );”