Need to identify this pin receptacle and plug
If the spacing between contact is 3.96 mm these are likely JST SL or HL or similar.

SL http://www.jst-mfg.com/product/pdf/eng/eSL.pdf

HL http://www.jst-mfg.com/product/pdf/eng/eHL2.pdf


The little raised feature just beyond the slot matches 
SL/HL have a 1.4mm wide flattened blade - that's 1/18 inch which compares nicely to the observed 1/16 inch
the "L JST" reportedly seen on one hints at it, too.


If the dimensions are wrong they might have re-used the idea at a different size.