Nope, it's upstream of the EVSE, actually even upstream of the RCD/breaker for the EVSE. So the EVSE just sees it as a blackout. It's remotely controlled by the energy company in a scheme known as "controlled loads" and typically used for pool pumps, storage hotwater tanks and EVs. In return for giving them that control, they give you cheaper rates. As an added incentive (at least here in Qld) making it a controlled load allows you to set it to 32A. If it's wired to the always-on meter, you can only set it to 20A (I'm talking single phase... slightly different rules for 3 phase). It's typically only switched off for a few hours per day (7:00 to 9:00 and again at 18:00 to 19:30) so doesn't disrupt overnight charging much at all.Hi.
How was the contactor wired and controlled? I'm assuming it it must be on the output from the charger (mine's a tethered cable so envisage having to cut the cable and put contactor in between).
Assuming your energy company doesn't have such a scheme, then you could control the contactor with a simple timer, something like this.