This is how I've sent it, but then a friend of mine who is still preparing his application challenged me that this may be wrong. Now, I know I can still make good sense of things
It is clearly mentioned in the checklist document (IMM5612) that these two documents should be dated and signed by everyone in the following list:
-Principle applicant
-Spouse
You need to tick Schedule A form that this is filled and signed by spouse
In additional family information , your spouse name will be in applicant coulmn , and your in spouse coulmn