The E model has no quick couplers, the loader isn't quick disconnect. That's why the OP sent the pictures.If you are looking for loader pressures use the hydraulic quick connects they are the easiest to match when you are building your gauge. I prefer T-ing into the line so I can see pressures as the attachment works. instead of just dead heading the system at the quick connect.
The E stands for "economy" and it is you get what you pay for. Want deluxe, go to the R series. Get to pay for the "extras".leave it to deere to cheap out on the simplest upgrades. So I guess the loaders are not removable (atleast easily)
kind of hard to identify fittings when they are still attached.