AC Upgrade to 15,000BTU

[Smackworth]

I just replaced my Penguin 1 for a penguin 2 on my 2008 Airstream, but, the original power goes into a metal 2 x 4 electric box and the penguin 2 comes with a flat 3 pin plug they call in the installation guide “strain relief cover” they explain how to wire it but they don’t reference a name, other than that, or a part number for the Airstream side to plug the two power cords together? Anyone know the part I’m referring to, and where to get one?
The new plenum they require doesn’t have room for the 2 x 4 box so I have to use this plug.

[Peter C]

Just had my 15K unit replaced on my 2013 27FB. Here is a picture of the drain system on the old unit. The tech transferred the drain cups and tubes to the new Penguin II. It required a couple holes in the gasket. He also updated the wiring on the trailer to use a connector rather than spliced in. I think that the new unit came with a connector so why not do it properly.

[panamerican]

I've been elated with my 15k unit since new. I had a 11k in a 19' Bambi I had for a short time. Was crazy how it couldn't even cool that small space.

Never looked back after going 15k and my unit isn't very airtight either, prob the direct opposite.