JavaScript partially applied function - How to bind only the 2nd parameter?

Sorry if I'm missing something obvious, but I can't figure out how to bind a specific (nth) argument of a function in javascript. Most of my functional programming I've learned has been from Scala so I'm not sure this is even possible in JS.

For example, I understand I can do the below to bind the 1st argument

var add = function (a, b) {
   return a + b;
};

add(1, 3); //returns 4

var addThree = add.bind(null, 3);  //this = null.  a = 3
addThree(4);                        //returns 7

But how can I bind the 2nd argument and leave the first as is. In other words how can I bind to 'b' only?

From what i can tell from mozilla - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind , the arguments are actually nested which makes it look like it has to be in specific order? (I'm very possibly reading this wrong)

Edit: I realize this is a sort of contrived example. I'm just trying to learn in case I eventually deal with something more complex than adding 2 numbers. I'm also trying to understand how the bind() arguments are actually working under the hood.