the abs is not connected to the clutch and slave cylinder.

the hydraulic hose that runs under the ABS assembly is the clutch line but it does not connect to the ABS system at all...it merely runs underneath and routes to the clutch line damper, which is bolted near the wheel-well.
from the clutch damper, the soft clutch line runs to a solid steel line mounted to your tranny via the tranny-to-engine mount bolts. at which point it connects to the slave cylinder and release fork.

the ABS and clutch are not connected.

on a hill you should not be applying brakes in the snow or ice. simple rule

you should be using engine braking to slow down so as not to lock the wheels or even allow the ABS to kick in.

i have noticed the ABS has trouble on ICE. but then again the ABS is designed to reduce human error in a stressful and accident prone situation... like on the highway, at 120 MPH, when locking your wheels can get you killed. thats how it saved me.

~boom