The shape of each roof-frame connector affected which faces I could reach. These L-plates are part of the purchased options for joining a corner across the outside of the extrusion.
The drilled connectors and fasteners joining my added extrusion to the roof rack.
The item in my kit
I bought Befenybay Black L-Shaped Joining Plates as part of my camper van equipment.
The shape of each roof-frame connector affected which faces I could reach. These L-plates are part of the purchased options for joining a corner across the outside of the extrusion.
Where it fits my build
For the light bar, I cut an added extrusion beam and made three short drilled connectors. The rack side used quarter-twenty hardware, while the smaller 2020 extrusion used M5 hardware.
The different nuts changed the assembly sequence. A rack nut had to slide in through an opening, which meant undoing bolts I had already tightened; the smaller nuts could move and spin while I tried to start a bolt. I used an Allen key to reposition them.
The profiles and joint hardware during my roof-mount assembly.
My build notes
The cutting and drilling made the components, but positioning the small hardware took its own time. I recorded the difference between inserting the rack nuts and fishing the smaller nuts into place because it affected how the joint went together.
The profile, connector shape, bolt and slot nut all contributed to the assembly sequence.
Alternative products
Two alternatives to compare
Boeray offers another five-hole L-plate. The other kit groups L-plates with screws and slot nuts for the attachment points.
Boeray Five-Hole L-Plates
These Boeray plates have an L-shaped outline and five fastening holes. Their flat form spans the outer faces of an extrusion corner.