How to connect to a socket.io room from another server node.js

I cant seem to find a socket.io method that would do this.

I'm trying to create a "finding a game" system that would grab player from an array then put them in a room that's open.

index.js:

// Put user in find a game queue.
socket.on('bsb2v2find', function(data){
    bsb2v2finding.push(data);
    userdata = data;
});
// Server gets an update that there's an open server.
socket.on('bsb2v2opnrm', function(room){
    if(bsb2v2finding.length >= 4 && bsb2v2finding.filter(function(player){ return player.username ===  userdata.name}).length){
        var players = [];
        repeatLoop(4, function(){
            players.push(bsb2v2finding.shift());
        });
        repeatLoop(4, function(i){
            // This is where all player connect to a room on the game port. 
            players.socket.join(room);
        });
    }
});

function repeatLoop(num, callback){
    for(var i = 0;i !== num;i++){
        callback(i);
    }
}

via Korbin Deary