So after logging in to MyCIC and clicking on linking the account, use below format
Category: Permanent Residency
Sub-Category: Family Class (Spouses)
In Application Details: Use, Family Name, Give Name and Date of birth
All the details here should be PA's details
Next Section, select Passport and put PA's passport details
Province and City should match the details you submitted with application and marital status is Married.
Family size should be 2 if no kids
Note, anyone can link your account as long as they have details