When I bought my Boxster, the convertible top in what the seller called
"manual mode" (motor broken, lift it up yourself).
Well, I have since replaced the motor, but it seems that some kind of arms that were removed in the process of converting it to
"manual mode".
I also found this part in the trunk, but it is not long enough to reach between the two connections so I believe there is a piece in between. (It's labeled "R" for right.)