You're going to have to cut the wire holders and spread things out a bit so we can see where it connects. Another option is to take off the cover and see what the box is. It's either home made or bought, should have some names and numbers on it.
Chasing the wires to see where they connect would be the best bet.
Do you have any LEDs, some use a different blinking control to account for the speed of LED vs regular bulbs.
It doesn't go anywhere else but to the harness. It's sealed off so I don't know if i should cut it open and risk getting water into it down the road.
If it is some sort of standalone fuel controller, aren't they usually plug and play instead of requiring you to hack/cut into your oem harness, he didn't even use heat shrink tubing but rather electrical tape. This is such a sloppy install.
The bike manual has a good wiring schematic in it. If you can trace the units wiring to the OEM wiring you might be able to figure out what it does. For example a fuel controller may need to hijack signals from some sensors ie air intake temp, TPS.
It's a little odd it doesn't have any markings or logos.
I wouldn't mess with it too much just yet. Wait a few days someone may recognize what it is from this post.
Any chance of contacting the PO?
The Orange (Left turn signal), Lt. Blue (Right turn signal) and Green / Yellow (Brake lights) all point to some sort of turn signal / brake light integrator. Notice the two gouges in the Green / Yellow wire just out of the white three pin connector: looks like the bite of a ScotchLoc connector, probably an aborted attempt at installation of whatever it is.
My advice: turn on the key and activate either turn signal, and if that doesn't do anything tap on the brake. The turn signals may light with the brake lights. Past that, I have no idea.
Of course it may be a GNDNBIVE.
If it has already been done, it is safe to assume it is possible to do it.
On the other hand, if it has not been done never assume it is impossible to do it.
------- Rob --------