There’s a thumb rest sitting on the pickup ring.
Duh! I need to slow down, put my glasses on, and remember he plays upside down or whatever he does.
Bingo! Yes, the pickup is way narrower than the TB+, so I had no distance to rest my thumb and have room to get to the E string. The pickup rings are too low to the body to get me to the higher strings, so this gives me pretty much what I need now. It could be slightly further from the string, but like everything else with this bass, I'll get used to it. I'm not really doing much with it until I'm done with this current project, next week.oh - yes - it's there... very stealthy...