dhcp relay help

[mstrmp3]

We have 1 DHCP server that currently passes out the 192.168.1.x addresses. We now have (via MPLS) 4 new networks (192.168.2.x, 3.x, 4.x, 5.x) and was wondering how to pass DHCP addresses for each of the respective sites. Each site also has a 1910.

Switch 1 (the one with the DHCP server attached to it) has an IP addr. of 192.168.1.253. The DHCP server is 192.168.1.2. These are on VLAN1

Now switch 2 is 192.168.2.253. I have enabled DHCP SERVICE on the DHCP RELAY page, assigned 192.168.1.2 as server group 0 and enabled the 192.168.2.x interface for DHCP relay.

My question is what do I have to turn on for Switch 1? (if anything)