I feel foolish, but I cannot see where I put the dongle.
I just purchased this trailer, and controller is installed next to battery (not above) in a very small battery compartment. Is this ok? Many websites say not to install next to a battery due to potential gassing damage.
And, I don't know where to look (or feel) for the dongle connection spot.
Image is rotated for some reason. Yellow fuse(?) is at the top.