[cricketo]

I don't believe Curtis supports different forward/reverse profiles. HPEVS VCL has support for that, so you may want to look into their parameters instead.

 

[remy_martian]

Relay on the reverse switch that parallels a resistor with the throttle pot power and ground leads...

K.I.S.S. hides the need for a Dummies guide.

 

[SimonRafferty]

The way I've seen that done, without parameter changes, is just to use another pair of contacts on the forward / reverse switch which are closed when going forwards.
Connect a resistor between +5v & the throttle pot teminal which would normally connect to 5V - then use the switch to short the ends of the added resistor.
If you made the resistor the same value as the max resistance of the pot, when in reverse, it would halve the speed for a given throttle position.
If you used a variable resistor, say 3x the resistance of the throttle pot, you could adjust reverse from 25% to 100%

 

[cricketo]

Resistor tricks don't work when the throttle isn't mapped proportionately.

 

[remy_martian]

They work, because not everybody goes 60mph in reverse like you do 😂

 

[Amol]

No need to hardwire anything all you need to do is Adjust "reverse map" parameter in throttle menu.
If you make it 50% it will set reverse max speed to half of the max speed settings. Like that.