heater hose routing

[123abc]

has anyone got a diadram of heater routing for 351c 70 mustang I just need to know which one is feed and which is return to pump

I have 3 blocked off on the left side looking at the block 2on the block 1 on the pump qas I said I only need to kno which is feed and return

[boofhead]

[123abc]

my mistake 2 on the pump 1 on the block
im thinking the return would be the block one

[123abc]

I think that's a Windsor diag boof

[ozbilt]

Top hole; in firewall, hose runs to water pump,

Bottom hole; hose runs to block next to distributor