I need some help from a Photoshop-Wizard-Anon to help Professionally Stitch these two set panels. (1st set and 2nd set each contains 3 parts) no need to adjust any colors or contrast, I just need some help to get these stitched together Smoothly and Evenly.

1st set here: https://files.catbox.moe/39puz5.rar
2nd set here: https://files.catbox.moe/eh8si1.rar

I would appreciate if you saved it as PNG/TIFF/BMP and upload on catbox/mega etc. and I will edit them further myself.

Thank You!!