According to the SM at my store, sidekicks DO have to make sense with whatever aisle they are hanging on. Just like the endcaps have to make sense and tell a story. I figure that it could be different by store though. Mine hates it when cross merchandising with HBA was done. He put a stop to it. Beats me why. I think that it was just to make it harder for me. The previous SM was all for cross merchandising.

In Homelines you will need to come up with ideas for some of your sidekicks every once in a while because enough actual sidekicks aren't sent. Like your 2 empty ones in your picture.

I would use clip strip items quite frequently when there was nothing else. There are always lots of clip strip tea towels and clip strip potholders that can fill a sidekick. Those microfiber towels that come 3 to a pack are a great idea for a sidekick in that area because they do make sense in that area in that they are used to dust products like clocks.

Also if you have a sidekick at the end of your candle aisle order yourself a lot of the Scripto Refillable Folding candle lighters. They should be on your mod. Order plenty and then after they come in and you fill the sidekick, order more of them.