Can someone clear up VR sensor wiring on the V3 MicroSquirt?

[abecedarian]

The wiring diagram here says the following:
Pin 33:

Variable reluctor A/C signal input (ground) for Input 1 & Input 2 (if used). Note that you can use only one of OPTIN+/- or VRIN+/-, because they connect to the same processor pin. For the second ignition input (Input 2), use VR2IN+ (Ampseal pin 4). For more info, see: vr.htm

Pin 21:

This is the ground pin for the second variable reluctor input (typically for a VR or Hall camshaft sensor). For use with a variable reluctor sensor (that has an AC signal) connect this wire to the second VR sensor wire. For use with a Hall sensor, leave this wire 'floating' by snipping it off and sealing it. For more info, see: vr.htm

So, if I have a VR input 2, i.e. a 2nd VR sensor, which wire does its ground connect to- pin 33 or pin 21? ... or both? ... or either?

[abecedarian]

And it also states:
pin 32 harness and pin 33 harness wire colors are TBD (to be determined)- have those been determined?

Sorry if this has been asked before but I'm trying to plan my harness.

[Bernard Fife]

abe,

Use pin 21 for the ground of the second VR sensor (but not a Hall sensor). I have fixed the documentation. I don't know if the colors have been sorted - I will try to find out if they have and add it to the docs.

Lance.

[abecedarian]

abe,

Use pin 21 for the ground of the second VR sensor (but not a Hall sensor). I have fixed the documentation. I don't know if the colors have been sorted - I will try to find out if they have and add it to the docs.

Lance.

Thanks.