Cloning 2 drives

No, During the process, the Destination drive is wiped of any data or partitions. The cloning process takes an image of your Source drive and then clones it, as is, to the Destination drive. If the Destination drive is larger then the Source drive, it will increase the size of the clone to take up the whole drive.
What you Can do, is to take an Image file of both HDD's save the images to a third drive and then Partition the Destination drive into Two partitions, then restore the image of each drive to the partition you want.
Or forget the Clone job all together and just stick with making Images, you can fit several images on a drive but only one Clone

Yes, my bad, I meant Destination Drive.
We strongly suggest Imaging your computer and saving the Image to another drive that doesn't have the OS on it. If the OS becomes infected, or the drive fails, you can easily restore your image and be back to where you were when the image was created. Within minutes, not hours or days.
Having a drive with two Windows OS's on each partition will probably confuse the Bios into which one to boot from unless you specify it in a Boot loader like EasyBCD. Why do you want two versions of Windows to boot from? If you have two drives with Windows on it now, why not put both in the computer and select which drive to boot from in the Bios?
If the reason you are cloning is for backup, then Imaging is the way to go.

If you don't know the password of the Windows you are cloning, then you still won't be able to boot into the desktop on the clone job?
If you if you used to login with Microsoft Account and forgot the Password, you can go to https://account.microsoft.com/ and try to login with the last password, when that fails, choose Forgot Password, and it will ask you your security questions and send you a code via you smart phone or Email address.
The Data drive does not need to be cloned or imaged. You can just copy and paste, or drag and drop it to a new partition.
As for Clone as opposed to Image, an Image can be added to with Macrium. You can do an Incremental Backup, just backing up the files that have changed since the last Full Backup and adding that to the image to keep it current.
A clone cannot be added to. It will remain, Robust, as the day it was first cloned and will not be current with new files that are created since the clone.

If you if you used to login with Microsoft Account and forgot the Password, you can go to https://account.microsoft.com/ and try to login with the last password, when that fails, choose Forgot Password, and it will ask you your security questions and send you a code via you smart phone or Email address.

That is the point of trying to login to https://account.microsoft.com/ you can press Forgot Password, and then it will ask you security questions. If you linked your Smart Phone to your account, or Email address, it will send you a code to your phone or Email to type in and give you access or allow you to change your password.
When copying large files, you can install TeraCopy. If the copy or paste is interrupted, TeraCopy will allow you to start where you left off and not from the beginning, it also protects against stalls. But if imaging is working for you then stay with that.