Bunker Defence and Pillbox Defence

[typhoon]

Hi

Looking at the combat modifiers in the parameter data for Minsk 44, I have found bunker defence and pillbox defence (which are both positive numbers). As there are also numbers for bunker and pillbox (which are both negative numbers), what is bunker defence and pillbox defence?

Thanks..

Bunkers and Pillboxes provide an increase in the Defense value as well as the fire percentage modifier. Furthermore, units in Bunkers and Pillboxes are considered Hard Targets and thus are only affected by the Hard Attack value of the firing units. To receive the benefits of a Bunker or Pillbox, a unit must not consist of Vehicles (however Deployed motorized/mechanized infantry do benefit) and the unit must be Deployed.

Got this from the manual so if I’m right the first number is positive increase to defence the second number the number % fire modifier