Actually, where you want to look is in skin1/main/register_ccinfo.tpl
This is the 3.4.x version fix which can be adapted I would assume to the 3.5.x branch if you in fact do not have this already in the tpl as a hyperlink.
Look for:
Code:
{if #safeCCNum# eq ""}
<input type=text name=card_cvv2 size=4 maxlength=4 value="">
CVV2
{else}
{#safeCCcvv2#}
and change to:
Code:
{if #safeCCNum# eq ""}
<input type=text name=card_cvv2 size=4 maxlength=4 value="">
<a target="_blank" href="https://www.yourname.com/ccInfo/cvv.htm">
<font color="#000080">CVV2
Help</font></a>
{else}
{#safeCCcvv2#}
Now remember, there is a branch change here so the sode may not be exactly as it appears here.
The just of things is to make your WORD "CVV2" the hyperlink. I made my appear as "CVV2 Help" (on older versions) (new branch has this done already)
Now, after you have made your code change, you need to change the url to match your domain name.
Also create a file called "ccInfo" in the web site root or if changed, change URL to match location, this is up to you.
Then create your help page as you see fit. I used a combination of text and picture format for easy help.
All you need to do is take Credit Cards you use and find pics of the backs of them where the cvv2 code is and then show the location of the needed number and a brief description of WHY you require this to prevent fraud.
Most processors have these pics to use, but if not, let me know and what cards you need and I may also be able to help with that.
Hope this helps and is clear as mud.
