ABS gremlin; how to fool ECU/light

[ginge191]

abs warning light is on pin 21 on the abs block, wire number 443, it needs to be grounded to bring the light on

i would tag it onto the trigger wire on the alternator it will then turn the abs light off when the car is started with the engine running like the battery light

How would i go about routing a + on this wire; also, i can't see wire 443; only 441, 4410, 440, 449 around pin 21.

As for the MOT; would it not need to turn off with the ignition as apposed to the car starting , hence preferring to wire to the glowies rather than the alternator.