2 x 18650 Battery Holder with DC2.1 Power Jack (FIT0538)

Hi James
While on the subject of battery holders. I have a couple of 18650 holders. a single and a double , the double has a plug on the end of a couple of unidentified wires and a + and - moulded in the bottom of the holders. These are the same way around which is pretty ordinary for 2 cells which are supposed too be in series. Closer inspection reveals a faint + and - which is the correct orientation but pretty faint and I did not see this at first. Also I will pretty much defy anyone to fit an 18650 cell into this holder whether it has a cell protection device fitted or not (I have both). A solder tag type cell might fit, I have not tried yet.

I think (in all fairness I might not have) I purchased this from Core as it is the same as FIT0538. Even in the pic on Core product page you cans the heavily moulded + and - symbol in the bottom, one of these has to be wrong.
Cheers Bob