So after looking at this some more It is clearly a torpedo slot, and is pretty clear that it is not a torpedo (that much is obvious).
It also very much seems to say "Your u....." so the u is most likely indicative that it says "Your upgrade bar", hence you can reasonably conclude that it is giving your upgrade bar something. Likely a bomb slot.
However... IF that is true, I see an issue. You see, the Y-Wing has 2 torpedo slots. Suddenly the Y-Wing is a better bomber than the TIE bomber? What would be stopping you from using 2 bombs on a Y-Wing! Ion Turret - Proton Bomb, and Prox Mine, all in a single turn....
But what if it's not restricted ONLY to Y-Wings. Then a Slave 1 Title can in theory give the a Firespray an extra bomb slot. Bombers could hold three bombs.... but X-Wings too? Honestly IMO it should consume TWO torpedo slots to offer a bomb slot... this way a Y-Wing and B-Wing could still get one, while bombers can get up to two.
But what if it's Scum-only... but not restricted to Y-WIng. Still, you make Y-WIngs the best bomber... but you also can give the Slave-1 the option of a second bomb. Putting the TIE Bomber in 3rd place for bombing capability.