I would run the cables to a convenient place with easy access anyway. When/if you need to use them is not the time to have to crawl under the coach. Mine has automatic drains, the manual cables are routed to just in front of the LF wheel, above the frame rail. It's a easy reach with the awning hook. As Mr. D said, you don't want a body part underneath anything that will drop or move suddenly.
2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"