Jump from one project to specific slide in another project

I have two separate modules that I want to jump between, if the instructor chooses to do so, otherwise they should play as independent modules. In other words, if the instructor wants to jump from slide 4 in module 1 to slide 3 of module 2 to show a relationship between the topics, I will have a button that will allow the jump.

So far I can get mod 2 to open but it opens at the first page. If I add a function that calls a specific page, it will open mod 2 and also a blank page. I cannot get it to go to the page I want. I also need the 2nd module to be able to run independently from start to finish by itself when that module is selected in the course.

I have tried these posts:

https://community.adobe.com/t5/captivate/how-to-jump-to-a-specific-slide-when-opening-one-project-from-another-with-url/m-p/9540266#M251528 

and

https://community.adobe.com/t5/captivate/jump-to-a-slide-in-another-project/td-p/3728297 

as well as following the suggested posts from within these if they were applicable. 

I created an advanced action with Java scrip that reads as: 

if(window.location.href.indexOf("?slide"!=1){var slideNumber=window.location.href.substring(window.location.href.index Of("?slide")+7);var cp = document.getElementById("Captivate");cp.cpEISetValue("cpCmndGotoSlide", slideNumber-1);cp.cpEISetValue("rdcmndResume",1);}

This scrip is on the 1st page of mod 2 (the one I want to open at a spcefic page). 

The button on the page in mod 1 has the following: 

Open URL or file

drive\folder\folder\index.html or

drive\folder\folder\index.html?slide=3 (for the page I want to go to)

We are doing this locally for now. 

We are using Captivate 2019 (11.5.5.553) for this.

I am not real familiar with this type of coding so please be gentle in your answer and as specific as possible.

Thanks in advance for the help.