What does "PDP" stand for?

[Aviator_Boz]

So I'm flipping through the manual (electronically) looking for info on the Marinco spotlight. PDP doesn't appear to be defined on first use and I can't figure it our nor did an internet search help. Looking for ideas as I need a reason to slap my forehead and yell, "Duh!"

 

[Jesperjo]

It probably just stands for “Power Distribution Panel”. That would be implied by the placement of it on this diagram as well.