SeeMeCNC Rostock MAX v2 Assembly Manual page 163

Fig. 12-11: Two arms installed.
With two arms on the Cheapskate, you now need to install a retaining clip. The clips slide in
from the side, between the "fork" on the end of the delta arm as shown below.
Fig 12-12: Retaining clip installation.
Fig. 12-14: Clip fully seated.
Repeat this task for the arms on the other two Cheapskates.
Rostock MAX v2 Assembly Guide
Fig. 12-13: Clip is seated on the axle.
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