It does not specify what office in the SA letter. It just says this:
The Application for Permanent Residence for your relative(s) will be forwarded to a visa office for further
processing.
Visa Office Contact Information
Should you need to submit additional information or make any further enquiries regarding the
Application for Permanent Residence for your relative, you must email the visa office listed above
directly using the “IRCC Web Form”. This form is found in the “Enquiries” section of the specific visa
office’s link located on this page:
http://www.cic.gc.ca/english/information/offices/apply-where.asp