We know that the stages of Saturn V were mounted to each other with explosive bolts. Separation was done by ignition of these pyrotechniques.
But we also know the control computer of the Saturn V was placed on top of the third stage and controlled the first and second stage too. So there were cabels from third stage down to first stage.
To cut cabels between Apollo CM and SM pyrotechnic guillotines were used. Also between first and second stage of the LM.
So there should be also pyrotechnic guillotines within the stages of Saturn V.
Are there any reports about the pyrotechnic guillotines within Saturn V?