The seam will show as a dark line when illuminated, if you butt it together it will separate over time.
I would butt it together and run edge sealer over where they meet. Same as how I handle perf.
Where they butt, have a 1/2" overlap with no printing to one side. Put the first piece down without the overlap, then put the clear part over 1/2" of the printed one and weh-lah, it's overlapped without any real noticeable seam.