The default top banner for your group is empty by default but you can upload an image for your institution as you could with LibGuides V1. The banner image will automatically link to the HSICT main site, though, so you'll likely want to customize that. Go to Admin > Groups, click 'edit' to the far right of your group in the list, then select the Header/Footer/Tabs/Boxes tab.
Only use the "Upload this image" option if you want your banner to link to the HSICT page. To link to your own page, select the Display this HTML radio button, instead, and input the following html in the box below:
<div class="container" style="padding-left: 0; padding-right: 0;"><a href="http://yourlibraryurl.com/" target="_blank"><img src="https://yourimageurl.png" /></a></div>
This will assign your url to your image and, as it's currently set up, your link will open in a new tab. If you want it to open in the same tab just remove "target= "blank" from the code.
If you would like the breadcrumbs to start with your institution, here's code you can use under the Custom JSS/CSS Code tab in your Group admin area to hide the first two links:
<style>
#s-lib-bc-list > li:nth-child(2),
#s-lib-bc-list > li:nth-child(1) {
display: none;
}
li#s-lib-bc-group::before {
content: " " !important;
}
</style>