I’ve never been happy with the normally available 12VDC outlets (receptacles) - not the W.P. Bi-Pin
Deck Connections (Perko1189 Series, Cole-HerseyM121-BP, SeaFit, & etc), and especially not the Lighter Socket type (commonly fitted to accessories).
For 12 Volt DC accessories, I use “Midget Twist-Lock Devices” (2 Pole, 2 Wire, Polarized, NEMA Code ML-1), such as the:
Hubbell #HBL7526C Flanged Receptacle (or
Cooper #7468 etc.)
http://www.hubbellcatalog.com/wiring...s/Page-B03.pdf
and
Hubbell #HBL7545C Plug (male cord cap) (or
Cooper #7467 etc.)
and
Hubbell # #HBL7506C Female Cord Cap (or Cooper #7464N etc.) to make an extension cord.
Although these devices are intended for AC use (UL rated for 15A 125VAC - polarized), they are an excellent alternative to the conventional DC outlets.
They are rugged,
corrosion resistant, easily installed, attractive, and best of all “Twist-Lock”.
Not normally available at
Marine stores, these
NEMA type "ML-1" Midget devices are available at any good
Electrical (or Industrial) Distribution Supply house.
Electrical distributers can be found by "Locate Distributers" on the Hubbell website at:
Hubbell Wiring Device-Kellemsistributor Search
I haven’t used the "Trolling Motor" connectors (Marinco #20188R), which though 4-pole, are "Twistlok".