A set up begins with checking the basics. Is the supports strong enough to support the home with tie-down unfastened. Untie home now or wait till last.
Some homes have connections that connect water supplies from one section to the other.
Make sure that there is a water cut-off valve to your main water supply, you may have to call your utility company. You will have to follow the electrical lines because they connect the two halves together at some point to complete the circuit. Now for the inside. Take that measurement and divide it by two. that will be the dividing line. Look up, look to your right hand side, now look to your left hand side, now look down.