Do you have the 24 P or the 24 F? One has the flushing inlet on the side next to fresh water inlet, the other has it on back by itself?
Then the next big question is at what point did it break? Did it snap only the outer portion shown in yellow and leave part of the what is shown in yellow stuck in the fitting, pull the whole yellow off the wall with screws and all to break further inside the wall?
If it ripped the whole portion shown in yellow, can you see the tubing and fitting when you look into the hole left? If so, can you see sticking something into the end of the tubing and fitting left, expand it and get the remains to pull out of the wall?
Since it it a flexible tube inside, the odds are good that it only snapped the more brittle fitting which can leave it somewhat okay to push something into the tube end,expand it and carefully tug it out to a point where you can change the fitting or take the broken part of the yellow out of the fitting.
If you are lucky enough to have only snapped it at where the yellow goes into the orange, it involves pulling the tube out as there is likely to be slack, grip the fitting where the yellow screws in and then there is a tool called a "nipple extractor"to remove broken items like this.
The tools come in a lot of different forms like these:
The trick may be to NOT push the broken end back and let it fly away from the hole!