Unable to upload transcripts

[Vignesh_gnesh]

Hello, I am applying for a student visa for Canada. I have secured admission to a fully-funded MSc at Western University. so I don't have to pay fees and It includes a living support package of appx $16000 for my stay in Canada.
While applying, on the IRCC page, I don't see any column to upload my transcripts. Can you please suggest how can I upload my transcripts?
Please help out. Thank you in advance. I am applying myself so I apologise If I have made any mistakes.
Here is the Preliminary Questionnaires that I answered. Please let me know how to upload it.

 

[wonderbly]

You upload any non-required documents that you want to submit under "Client Information". You have a maximum size limit of 4MB so you might need a PDF compressor tool to make your file smaller if you have a large file.