I have a plastic box - similar to the ones that contractor power tools come in but smaller, Bunjied to the front edge of my HF QuickHitch. Its set up where I can open it without releasing the Bunji cord. Just right for 3-point pins and clips, a couple of tiny wrenches to adjust the up/down limits of the 3-point, screwdriver, fence pliers, etc. I'll go out and take a photo if this would help.
Also - see my sig photo below - on the little Yanmar I have toddler-size backpacks hanging off each side of the cowl with their top-center grab handles looped around the fuel filler. In the past one of those bags was a six-pack insulated soft bag. Contents: 2-quart cranberry juice bottle holding drinking water, pruning shears, flagging, room for a light sweater if I take it off midmorning. On the larger Yanmar there's room to hang similar bags - small canvas shopping bags - from the ROPS. I added two golf bags for the long handle tools I need in the orchard - hoe, shovel, bow saw in the back one. The front one (hard to see, red, behind the right loader column) carries two 10 ft chains and a long-handled pruner.
I now have a different small Yanmar, this one with a loader, and I lashed a piece of Sch80 plastic drain pipe vertical on the left loader upright. I use it to carry the long handled pruner, or a shovel if I'm doing road work.
Hope this gives you some ideas!