vintage WWII radio / electric power cable?

Description

Here we have a heavy power cable, 3 prong male on one end, and 2 post female on the other.  Because I got this with a buch of other WWII era airplane related radio and radar equipment, and because of the nature of the connector, I'm *guessing* that this was part of one of those systems - a power cord.  But I'm not sure on that.  It's about 9 or 10 feet long.   Weight 1 lbs (Before packaging)
----------------------------------------------------------------------------------------------------------------------------------
Items ship from zip code 68046 in the U.S. Shipping costs quoted are to the continental states only, anywhere else will be more.
SHIPPING-UPS & FEDEX:UPS and FEDEX **DO NOT** deliver to PO boxes.  Please provide a REAL address.
SHIPPING - PACKING:  I take packaging seriously.Heavy items will be packaged using solid styrofoam block.  It is very rare for the items I pack to be broken, as my feedback should attest.
LOCAL PICKUP: Local pickup is great!  Especially on those large items.  I can be flexible with scheduling - just ask!