What is IRCC Montreal's mailing address?

[DJEONG]

Hi,

Looking for IRCC Montreal mailing address. On the CIC website, it shows 2 addresse(one in Complex desjardin, one on Saint Antonie) but to which one is for mailing address?
I got requested to send additional papers just to 'Montreal' IRCC, it does not specify to which address.

Thank you