Problem with creating cronjob for Sendy

I'm installing Sendy to send my email and according to their instruction, I need to create cronjobs to schedule list import as well as mailing.

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Code:

php /home/nginx/domains/quantnet.com/public/sendy/import-csv.php > /dev/null 2>&1
*/1 * * * * php /home/nginx/domains/quantnet.com/public/sendy/import-csv.php > /dev/null 2>&1

After I did those commands, and run less /etc/crontab or crontab -l, it does not show any cronjob.

I even use the absolute path for php which is /usr/local/bin/php
I'm curious to see if there is a specific way to create cronjob in centminmod?

 

Solved.
Edit /etc/crontab/ and add the line to the bottom
*/1 * * * * php /home/nginx/domains/quantnet.com/public/sendy/import-csv.php > /dev/null 2>&1

 

I have a 30K list from my forum so I need to import it to my sendy. They use a cron job to schedule the importing.