HPDI Assistance Required

[225XCL]

Hi Folks, I'm in the process or reassembling a 300HP HPDI that I didn't strip down. I bought it form a guy who had started stripping down but gave up on it.
I've figured out about 90% of the wiring and plumbing but have a few items that I am struggling to figure out.
There are 2 hoses coming out of the rectifier/regulator and I assume they carry water but I cannot see where they are plumbed into.
There are 2 large brown plugs at the back of the engine near the ECU and injector drivers and I cannot figure out or find what they plug into, or what may plug into them.
I need to make a few mods to plumb in the water cooled intake as the engine was originally a 250HP and didn't have it, I'd planned to feed it from the tell tale and then route the outlet back to the tell tale outlet (Seems neat and just needs a few T pieces and hose), does anybody see an issue with that approach?


Cheers
Jason

[225XCL]

Question 1 answered after carrying out a little more reading it turns out the tell tale is routed through the reg/rectifier. I'm also going to route the inlet cooling water off that as well. Hopefully that will work fine.

Question 2 also resolved now. Had a really good look at those plugs and they are capped. Perhaps used for diagnostics or Command link/DEC rigging systems.