Any Plug-In-Systems experts?

[Jev88]

Hi.
I acquired an unused Plug-in-systems controller dated 2014.
My Autocruise Motorhome is 21 years old and I have a few issues with a good 12+ volts reaching everywhere it needs to. Fridge was easy as a crap splice/block had been used to repair a wire UNDER the fridge for example. Just pulled the controller unit out and sure enough another 5 spliced in blocks located at rear and all replaced with WACO now by me despite the tight space.
So I thought I would have a go swapping out the controllers when I discovered a very slight code difference that means plugs on rear don't quite match. Where I have a 15 pin block the newer model has 2x 4 pin blocks.

My unit - PM5SBWCH (which curiously has Cockburn Holdsworth written on cover plate - who were they?)
New unit -PM5SBWAH
Can't speak to Bonus that bought out Plug-in-systems this week (engineering on holiday) and I'm not really in a rush but I do like solving puzzles!
My older model isn't even listed on the Bonus database (admin checked for me).

 

[Driventemple]

Richard Holdsworth were a Reading based converter that went bust in the 90s.

 

[TheBig1]

one of the repair specialists might know the pin out and have a source of replacement plugs. try apuljac engineering