The diagram that you are using is for an old Club Car series cart. The one that you want to use is for a shunt style. I have attached a wiring diagram for a DS with a IQ 1510 control. If and when you get power to the control, check pin 9 and 10 of the 16pin connector for battery volts. This will need to be checked with the two/run set to run and the key switch on. If either of these lines do not have any power, the control will not power up.
CLUB CAR DS 1510 WIRING.pdf