Getting visa approval for physically deformative

Hi,
I'm a Civil Engineer fresher, I recently got an offer in KSA from a reputed well known company, company has sent a common working visa to my agent, the thing is I'm having a physical deformative in my left hand (I can do all the work but I cannot move my wrist properly & cannot work with fingers properly only in left hand) I went for the medical here in my country Srilanka, first doctor said that he won't be able to pass my medical due to this, but I some how managed to convince him & said that I'm not going to work as labour im going to an engineering position and so on and he then said ok he would pass my medical..

Next ill be going for the finger print process, I just want to know what will happen if i fail to in that? I cannot properly place all my fingers in left hand on finger print scanner, if I supposed to place only thumps it wont be a issue i just can place thump properly...

Other thing is even if i get my visa stamped after i travel to KSA their will be another medical test for Iqama na?
What will happen if they reject me because of this deformative?
I just want to know will they consider these deformation everything in Iqama process? To my bad company has sent me a common working visa also instead of an engineering visa!