old thread but for everyone searching for panniers, I went to their site and found that they customize their panniers to fit your ebike rack. you have to send measurements and such and can choose from various hooks
https://northstbags.com/en-ca/blogs/product-features/how-to-select-the-ideal-bike-pannier-hook-size
https://northstbags.com/en-ca/blogs/product-features/how-to-select-the-ideal-bike-pannier-hook-size
