Hah. I had the exact same issue with my Autocord today when I fired it up for the first time! I just took the adhesive strip from the end of the roll and folded it over so it sits over the side of the finder.
I recall those stick on reminders but don't know if they are still made.
My bigger problem is using unboxed film and not having a box end to stick in my M645 or 35mm cameras. I use a box end from another box, and if it's a different type I write the type on the back and insert it back side out. I find I always (well, pretty much) remember what's in my TLR because I only have one TLR and it doesn't of course have interchangeable backs. I have a terrible time remembering what's in which 645 back (because they look identical) or what film I put in which 35mm body without those things.
The bigger issue for me (since I don't get the film developed right away) is to remember which camera I used.
I tried the stick-on plastic reminders but they fall off after a few weeks of use. Notebooks, (paper, not computer) work for me.
Camera is easy for me to determine. I have three ways to shoot 120 film - Yashicamat 124 in 6x6, M645 Pro in 645, and roll film back for my 4x5, in 6x7. Negative size tells me definitively which it was shot in, at least for now. ;)