synergistic research orange blue fuse direction.

Hi, I have two 611s, one 302 and one 452 McIntosh amps, and I just purchased three Synergistic Research (SR) Orange fuses. I also received one SR Blue fuse free with the purchase of the SR blue receptacle. Would someone advise me with some specificity on the directional installation of the Blue and Orange fuse. Again all the amps are McIntosh.

Thanks.
Guy