/* General Image if other codes are empty + Pregnant Ladies */
div.cave-grid>img {
content: url('YOUR IMG LINK HERE') !important;
display: inline-block;
width: 60% !important; /* this is for you to change the size of it, can use either px or % or whatever */
height: auto !important;
}

/* Pride Overview */
a[href$="lionoverview.php?id=296801"]>div.cave-grid>img {
content: url('YOUR IMG LINK HERE') !important;
width: 60% !important;
height: auto !important;
}

/* Unsorted */
a[href$="unsorted.php?id=296801"]>div.cave-grid>img {
content: url('YOUR IMG LINK HERE') !important;
width: 60% !important;
height: auto !important;
display: inline-block;
}

/* Sales Cave */
a[href$="263481"]>div.cave-grid>img {
content: url('YOUR IMG LINK HERE') !important;
display: inline-block;
width: 60% !important;
height: auto !important;
}

/* Main Cave */
a[href$="235226"]>div.cave-grid>img {
content: url('YOUR IMG LINK HERE') !important;
display: inline-block;
width: 60% !important;
height: auto !important;
}

/* Mutation Cave */
a[href$="265462"]>div.cave-grid>img {
content: url('YOUR IMG LINK HERE') !important;
display: inline-block;
width: 60% !important;
height: auto !important;
}

Open your local notepad app
Copy everything from here (this is your current free css)
paste it in the notepad
at the veeery bottom, paste the code I provided earlier with only modifying the url for the images, do not remove the " * "s from the one I gave or anything in the code as in CSS it will break everything lol

Then I will let a professional explain the rest:
Pulling from this wonderful guide by Katie #106445

""STEP 9:
Once you're done, you'll need to save your CSS as a .css file. To do this, click File --> Save As, and change the dropdown menu to "All Files".

Then, name your CSS whatever you like, but make sure you add .css to the end. If you've downloaded the Dropbox software, you can save it directly to your Dropbox that way. Otherwise, go to Files --> Upload Files on the Dropbox website.

After that, you'll need to create a link. Hover over your file, then click "Share".

Then, click "Create Link", then "Copy Link".

You ONLY need the code after /s/. Copy paste that into this code:

<*link rel=""stylesheet" type="text/css" href="https://dl.dropbox.com/s/YOUR CODE URL RIGHT HERE" /*>
[^this one you should remove the *s]
Then, paste the entire code from above into your territory description.""