According to the Ford wring diagram I have here for the 3 door it’s the following that applies;
RED goes to fuse 26 (should be hanging beside relay cluster)
BLACK/RED goes to pump supply (also goes to ISCV and amal valve)
BLUE/BLACK goes to Pin 28 of ECU
BLACK goes to ignition
But TBH I’ve found a lot of the colours sometimes don’t match what’s in the diagrams, I do have specific 2WD saph diagrams but they are not much better.
As for the relays, it doesn’t matter which relay it is you use, as long as it’s the same rating as the old one and it has the ability to plug into the holder and has the same number of contacts, lots of Fords use those yellow realys, I have lots out of a mondeo in my saph and they work ok. I think the one you are referring to is 30 or 40 Amp and 12volt.