If you found two of the fuses already, then you've passed the red buckets, which are close by the alley that leads to the toilets and the workbox with fuse #3. As you come out of that alley, turn right. You may need to take a step or two forward then, but click on the arrow at bottom of screen to look downwards. You need to look down to see the red buckets properly.
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"Bleat, Watson -- unmitigated bleat!" ~ Sherlock Holmes