Yamaha Ebox fuse

What size is this supposed to be? I blew one in one in my js with a 6m6 and it was a 10 amp. I checked my sj and it was a 25 amp. I searched and found nothing.
 
Thanks. I figured id be safe with the 10a. I know from past experience its better to use a smaller fuse if your not for sure what size. I melted my wiring harness on a Toyota Mr2 due to using a larger fuse.
 
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