This generator is portable (it's designed to use a #20 lb. propane tank). But I want to use this larger 100 lb. propane tank with it when using it to operate my water well pump. How do I make this connection from my 100 lb. tank to my generator properly and safely? Also the generator does not have a external regulator like my gas grill has on it. I want to do this correctly and most of all safely. HELP!