This is the HTML code for making a basic hyperlink:
<a href="Amazon Wishlist URL">Text you want to show on your profile to click</a>
If you want to use an image as the link, this is the code:
<a href="Amazon Wishlist URL"><img src="Direct URL of the picture"></a>
If your question was how to get the direct URL for an Amazon Wishlist to put into the code, then you need to have the list privacy set to either 'Public' or 'Shared' -> There will then be an option in the upper right of the wishlist that says "Share List" -> Click that, and copy/paste the short URL it gives you into your profile, using the codes I gave you above.
Also, and you probably already know this, but do NOT have your real name or address associated with the wishlist in any way. Make a completely new Amazon account under your cam name, do NOT add an address or any identifying info to the account, and only accept gift cards until you can get a P.O. Box or remailer set up to protect your privacy. It's simple for people to get your home address through Amazon, and it'd be a nasty introduction to the potential dangers of camming for someone to show up on your doorstep.