HP41 band aid ... ?

[brouhaha]

(02-07-2023 11:41 PM)Didier Lachieze Wrote:  Looking at the pictures it seems that the traces are masked except at one end where I suppose they make contact with the HP 41 modules flex PCB. So I’m wondering how do you connect an internal module board to these traces?

I think the other side had another unmasked section. I haven't seen it since 1982, though, so I'm not 100% certain.