Registry on save the date?

You can put the registry on your website but the only other place registries should be listed is on any shower invite.

Link the web site. Don't use a honeymoon fund or cash fund. That will save you from a headache on WW.

Link on your website.. FH and I are registered on Zola just to make it easier with our registries (one brand name store, two small stores from our hometown) and some of our guests have asked where to go to find our registries. I just tell them it's on our wedding website.

I put my website on the back of my save the dates

The advice already given is correct. It's pretty easy to understand the etiquette if you look at it this way:

Save The Date (for our wedding)

and here's where you can get the gifts we want.