Additional documents after submitting PR application

Hi, I had submitted my PR application with complete details of primary applicant, and letter of explanations for spouse and new born. Now I got their police clearance certificate, and medicals.However, I see there is no option to upload additional documents. My application status has not changed since I submitted it on 12th March 2017. I am not sure what they will do, in case the visa officer does not find my LOE convincing. Will they reject my application, or give a chance to provide additional documents along with any explanation(if needed). Any suggestions what could be the best way forward for me? If anyone has been through a similar experience, please do share your thoughts. Thanks.
Your LOE should suffice, you can in theory call CIC and confirm that what you have provided is enough. You can also raise CSE with LOE just in case. The status will not change as of now.
Thanks Andy