Top picture is V(orne) - front, H(inter) - rear.
Bottom pick, presumably to and from the master.
Also TC on those works by cutting the throttle, not applying the brakes.
I'm not so sure about that. The ABS pump in the photos appears to be GM# 90444660 / Bosch 0-265-203-004-XJ. Seems to me that this unit is from a Model Year 1997 car. Production of MY97 V6 started in June 1996, so that's consistent with the "P" reg.
MY97 V6 cars were equipped with "two-way intervention" Traction Control. I understand that to mean that the TC system could cut the engine output and/or apply the brakes to a spinning wheel.
Power output is cut by retarding the timing and/or reducing the fuel. Later fly by wire cars closed the throttle when the TC was activated to cut the power.
countrywoman told us that that the ABS unit has five ports. And that these are marked V, H, h, I & none. Assuming a 3 channel system I would expect dedicated ports for each front wheel and a shared port for the rears. The rear circuit then goes through a T-distributor to branch to each rear wheel. So presumably that's port H. However we should have VL & VR for the fronts and we don't.
well dears it says across the top nothing on large union, I on next one a cast in small h on next then the 2 on front face V stamped in on one and H in the other and can only find 5 ports .