Hydraulic ram connection

Hi guys, new here. I recently picked up 2 of these hydraulic rams and Im having a hard time finding any info on them online but my problem is connecting hoses to them. The manifold has 2 holes with o rings on them. They are not threaded and i dont think there is enough meat to them to just thread them (need to go up to 5k psi). Im guessing there is another manifold that the hoses connect to that bolts down to this one but I cant find anything like it. Im thinking about making a new one and drilling and tapping new holes so that theres enough threads to hold the hoses securely.

Hi Chuck;  Welcome to Permies!
In my opinion do not drill into those cylinders.
Good chance you would  contaminate them with metal filings. Or just ruin them.
Use a heavy flat plate utilizing  the existing tapped holes and O ring location.
Then weld or tap & thread a( JIC ) threaded fitting , use a  standard hydraulic hose too connect to that plate.

EDIT)  Are those 2 way cylinders  (power out and power in?)
Or one way with power out and gravity return?
Also what are you hoping to use these for?

They are double acting. Im going to use them to build a couple of hydraulic presses.

I figured it wouldnt be a good idea to just tap the holes because there isn't enough thickness to hold the hoses under that kind of pressure. I could deal with the shavings.

That was my thought too I was just hoping someone would have seen these before n know what type (and where) manifold to get.