This is the Eurofighter kit I bought...
Ok... take a look in Steps 19 & 20, the main struts and the fiddly struts needs to be assembled in these steps.
Once they're assembled, they have to be inserted in the wheel wells as shown in Steps 23 & 24.
Kinda playing with fire with the risk of snapping the fiddly struts easily.
That's why I installed the main ones before the fiddly ones. Makes the potential to snap of to zero if done separately. Worked for me.