I do have a preferred spot for connecting the sense wire, and it is different from the generally accepted mindset. I would look for the bond/connection of the red and red/white wire from the starter solenoid and connect it there. Here is a schematic that shows how the wiring is done and illustrates the connection between the red and red/white wires:
On my 1200 this connection is about half way between the starter solenoid and the alternator (old RR position).
My rationale for this is that the battery shows voltage and does not represent the amps that the electrical system is using. Once the battery has been used to start the engine and has been replenished back to a 100% state of charge, the amount of current flow to the battery should be about 2-3 amps max. As long as the electrical system voltage is approx 14.2 VDC the battery will stay charged.
The remaining amperage some 20 amps say, goes through the ignition switch to power the bike for operation from this connection, so it is at the connection of the red and red/white wires in the wire harness where the current flow is split for use - "x" amount for the battery and "y" amount for motorcycle operation.
I will agree that this is probably splitting hairs with regards to time lag, etc, but I like to keep as much additional wiring away from the battery as possible. I figure if the OEM wanted to use the battery as a node, it would have.
I don't know how you have the new alternator wiring configured, but I stripped out the old stator wiring, and the red/white wiring as well. I installed a new power junction that allows me to connect the alternator, new wire to the starter solenoid, ignition wire, battery tender, the CFI 30 amp circuit, and a few others as well. This keeps all additional wiring away from the battery, and the system works well. Probably more work than what some want to do but it works for me.
Most of my research into this is from vintage car web sites. These fellows are very specific on this issue when doing a rewire of an older vintage vehicle. Here is a web site that explains a lot about what I am mentioning:
https://www.madelectrical.com/electrical ... ire3.shtml It mentions the factory "welded splice" hidden in the wiring harness as well - with picture that is exactly what you will find in the Honda wiring harness.
Many ways to do this, some time proven so to speak; however, I seem to be in a different camp than most others on this. I do understand why a certain way is used because modifying/changing motorcycle wiring is not that difficult, but it takes time, and can be more expensive - we all want to keep our costs to a minimum.
Just a few more thoughts on your question regarding the sense wire, and just my opinion.
Cheers
