Thanks for,your reaction! I must repeat it is not my car and I only got the photographs and the question...
Do you mean the circular (partly black partly 'yellowish') 'thing' about halfway the rubber tubing? I think that must be a kind of valve to open and close the passage to the airfilter. Un fortunately invisible if there is an electric connection to that part at the 'back' side of the photo. If it is some early kind of EGR, it will only let some exhaust gasses recirculate at certain temperature conditions, I assume. There is also some electronic print involved but not on the pictures...
If you mean the quite out of focus square part, a little lower, and a little more 'yellow', this is a superposition of views from lower situated parts, not connected to the 'questioneed' tubings and parts.
As by previous 'investigation' is ound out that the tubing is not for vacuum or coolant, it gives the strong idea that it has to do with exhaust gas recirculation... The main question of this post is: has someone ever seen this 'tubings' on another Panda? It is from 1987, FIRE 1000 with carburettor...