Sense is a part of the converter's feedback loop that monitors (senses) if there is any voltage drop between the board and the load (atty) and if there is, the converter will compensate for it.
Sense wasn't mentioned anywhere in the Raptor datasheet, except as a figure in the Turnable Loop section so I wasn't sure if this Sense needed to be connected only if the Turnable Loop is being used and I couldn't see any reason to use the Turnable Loop feature in our mods. I emailed GE tech support way back when I initially wired Raptor with some questions about Sense and the Turnable Loop and never got a reply.
My Raptor mods are wired without Sense connected. I've never gotten a voltage drop under load at output with Raptor so it's been a non issue.
I've since learned though that if Sense is a feature of the converter it should always be connected either directly at the load (atty) for optimal feedback, or connected at the board. So, I updated my wiring to include Sense connections for the Raptor.
With our very short wiring runs from the board to the atty, I really doubt there is much, if any, internal resistance causing a voltage drop under load else we would be seeing it with our voltage readers when measuring output load/no load, so wiring at the board would be much easier if you choose to do that.
