Board Thread:Support Requests - Designing Your Wiki/@comment-34585250-20181221205208/@comment-168424-20181221223916

Just upload your images to your wiki as you normally would, but make sure they match the sizes of the images in the other wiki.

Once you've uploaded the images, then you'll be able to update the JS to point to your images. Until you upload them, you can't know how to update the JS.