configuring two subnets towards the same destination with different routes

Hello Dears,

i have created to two Route Based VPNs (using two ISPs) on my SSG350 towards Cisco ASA,

in my LAN(connected to SSG350)

i have two sunbets( 10.123.236.0 and 10.123.237.0)

on the remote site ( ASA side),

there is one subnet(10.123.245.0)

i need to route the traffic of 10.123.236.0 to 10.123.245.0 from one VLAN

and route the traffic of 10.123.237.0 to 10.123.245.0 from second VLAN

the issue is that if i add the destination route like below

then all of the source subnets(10.123.236.0/24 and 10.123.237.0/24) will go throught tunnel.1(which is connected to VPN1)

how can i route each subnet on each VPN connection towards the same destination?

thanks,