Spotting for cuckoo

Honda Element Hitch and Wiring? - the hitch store

I try to install smoothly and wires for my 2008 Honda Element AWD, but I'm not sure what they are buying, or buy the wiring. UHAUL seems to have good prices, but it is installed, is a rip off (about 200 million of the economically active population), so I'll do it myself. This connection seems to be correct, but not if it comes with cables http://store.uhaul.com/hitch_detail.aspx ...

I am not sure that the cables to buy if you do not come with him. What are the different types
http://store.uhaul.com/product.aspx?id=1 ...

I am towing a jet ski only with the regular size hitch ball, and I think the 4-pin flat. Thanks