Bolt Locations - Grenade Man

First Half

Credit for this image to the MM8 Compendium (https://i.imgur.com/bMoVz45.png). Destroy the blocks in the order of the (white) numbers. 

The second bolt is on the high platform before the mid boss. This bold is collected in any%.

Image credit again to the MM8 compendium (https://i.imgur.com/9aFeEWr.png)