Contribution of WR-CRs to the all-particle spectrum. Top: C/He = 0.1. Bottom: C/He = 0.4. The thin lines represent spectra for the individual elements, and the thick dashed line represents the total contribution. The calculation assumes an exponential energy cut-off for protons at E_c = 1.8 × 10⁸ GeV for C/He = 0.1, and E_c = 1.3 × 10⁸ GeV for C/He = 0.4. See text for the other model parameters. Data: same as in Fig. 2.