Technical Differential gearbox help please

[Risk30uk]

I have taken my daughter’s gearbox out to change the input shaft bearing, but checking it over before re installation, I found that the planet gears had rotated and one gear had dropped out. I took the diff out but can’t figure out how to refit the cup part, pictured.

Any help appreciated and thank you in advance

Chris

 

[Risk30uk]

Don’t worry folks, I’ve sorted it out