Hi, Thanks for using JA. The drain plugs will be on the bottom on each side.
A SAE 30 power train oil or even an 80W/90 hypoid gear oil would be OK . However, depending on your climate, you should run a lighter oil in colder climates. There is usually a chart for reference on the operators manual on what is recommended for your climate and the refill capacities.
I know they are on the bottom somewhere, but where! I thought you would be more specific