Changing default from Watching to Plan to watch

// ==UserScript==
// @name         Add from Watching to PTW (FIRST TRY)
// @namespace    ChangeAddBehavior
// @version      0.1
// @description  When you add an entry to your list the script will make the entry be added to your Plan To Watch list.
// @author       hacker09
// @include      /^https:\/\/myanimelist\.net\/(anime|manga)\/[\d]+(\/.*)?/
// @icon         https://www.google.com/s2/favicons?domain=myanimelist.net
// @run-at       document-end
// @grant        none
// ==/UserScript==

(function() {
  'use strict';
  if (document.querySelector("#myinfo_status.btn-user-status-add-list.js-form-user-status.js-form-user-status-btn.myinfo_addtolist") !== null) { //If the anime is not on the user list
    { //Starts the if condition

      document.querySelector("#myinfo_status.btn-user-status-add-list.js-form-user-status.js-form-user-status-btn.myinfo_addtolist")
      document.querySelector("#myinfo_status.btn-user-status-add-list.js-form-user-status.js-form-user-status-btn.myinfo_addtolist").onclick = async function() //When the Add button is clicked
      { //Starts the onclick function
        var token = document.head.querySelector("[name='csrf_token']").content; //Creates a variable to hold the actual csrf_token
        var entryid = location.pathname.match(/\d+/)[0]; //Creates a variable to hold the actual entry id

        fetch("https://myanimelist.net/ownlist/anime/add.json", {
          "headers": {
            "content-type": "application/x-www-form-urlencoded; charset=UTF-8"
          },
          "body": "{\"anime_id\":"+entryid+",\"status\":6,\"score\":0,\"num_watched_episodes\":0,\"csrf_token\":\""+token+"\"}",
          "method": "POST"
        });

        document.querySelectorAll("#myinfo_status")[1].value = '6'; //Set the anime as plan to watch, in a way that the user can see
        document.querySelectorAll("#myinfo_status")[0].value = '6'; //Set the anime as plan to watch, in a way that the user can see
        document.querySelectorAll("#myinfo_status")[1].dataset.class = 'plantowatch'; //Change the selection box to grey
      } //Finishes the onclick function
    } //Finishes the if condition
  })();