OK, you want to know where to put the fuses? You've got what I think is a typo making your question difficult to understand. I think you are referring to
Installing a Marine Battery Charger ? on Marine How To? I'm familiar with that article having consulted it for the installation of the charger on my last boat. You're asking about a "genasun gv-10" A quick scan of that article and I can't find that term. A typo perhaps?
What Rod is telling you is to be ABYC compliant put a fuse near the battery. Please read these two paragraphs from Rod's article. My bolding
Again I suggest some research on selecting the correct type of fuse. Blue Sea has a lot of info but you have to dig for it. Rod on Marine How To has this article
Battery Banks & Over-Current Protection. As you read his or any other trustworthy info on fuses consider the AIC rating and if you need a high AIC rating or not. Quoting Rod again.
Simply put if the fuse cannot safely blow when the full current of the battery bank is passing through the circuit, in the event of a short to ground, then the wrong kind of fuse can blow yet in the process weld itself together so that the current is not interrupted. A fire results. If you've ever seen a dead short across a battery, I have a screw driver dropped across the posts of a starting battery, it's very impressive how much energy flows instantly and how hot things get. Our battery banks store an impressive amount of energy. Even a well depleted aging FLA bank. Don't give all that energy the chance to all get out at once through a dead short and failed fuse.
Your question I did not respond well to originally in your post #64 was where to find the fuses. Determine which fuse you need, Blue Sea is as good a place as any, use the Blue Sea # to search for the fuse and holder. Amazon is one place. Trustworthy marine suppliers are another. Caution, be sure you are buying genuine Blue Sea gear not knock offs. Example I have just ordered a Blue Sea Class T 125 AMP fuse. Blue Sea part # 5113. Blue Sea says to use holder part # 5007100. Found both on Amazon. Next I looked carefully at the images on Blue Sea and on Amazon to be sure I have a good chance of ordering the correct items. When I get the shipment I will double check. There are reports of knock off fuses not fitting the holder. If the fuse doesn't fit what else did they get wrong?
Knowledgeable people here may point out that Blue Sea doesn't manufacture some or even most of their parts. The do market quality gear. If you can't determine that on your own buy from an outfit like Blue Sea.