optoelectronics - Trouble changing an optocoupler without changing circuit functionality.

As a part of a circuit an optocoupler was driving the gate of a MOSFET as follows:

Now I need to change the above opto with a 4N46 darlington one.

I'm not familiar with these much and having difficulty to replace it. Here is the functional diagram of the opto-darlington I need to use:

How should this be connected as an interface so that it would have the same functionality with previous one?