Anyone know about the KH3 Save Editor?

I use the save editor linked to in the description here:

As well as PS4 Save Wizard.

It says to input these codes for these weapons:

Master's Defender, 033d
Kingdom Key D, code 0342
KH3 Mickey's Keyblade (unknown name), code 0343
Way to Dawn, code 034f
Braveheart, code 0350

Or to insert them into these offsets:
Slot 1, offset 1878
Slot 2, offset 1880
Slot 3, offset 1888

But what the heck are they talking about? Where do I find these slots so I can type them in?

 

You can try to contact Xeeynomo through his twitter but other than that I got nothin.

https://twitter.com/xeeynamo