analytics completed conversion customers drop funnel goal goals google google-checkout help issue leading rates transaction transactions url urls

I can see my google checkout transactions in google analytics - but what url I do I need to enter in google analytics conversion goals to be able to set up a google checkout transaction as a goal (also, I want to see what are the drop out rates of customers using google checkout, so what urls should I enter in the funnel leading up to a completed google checkout transaction)

help please on this issue