Here's mine. Pardon the mess...
The Parrot onboard arm switch is inserted from the underside and wired to the small terminal
strip (there's a thread on the FeatherWeight forum about this). This goes to
one of the two throws on the external switch.
The larger terminal block provides the other half of the switching (white wires
at the top) and the common ematch path (black wires). The green/black pairs
(yellow/blue tape on the right) lead to the main/drogue.
The 9v Duracell is mounted on the PC board (backside not shown) fed from the red/black pair directly from the Parrot.
Opening the ebay this morning, I decided this is not as neat as I'd like and
I need to add some additional strain relief...
NAR 83726 \ TRA 11640 \ L2