location of 73 280 sel 4.5 fuel pump relay?

I AM FINALLY GETTING AROUND TO FIXING MY '73 280 SEL 4.5 IT HAS BEEN IN THE BARN FOR OVER A YEAR NOW. IT HAS A FUEL INJECTION PROBLEM. THE LAST OWNER COULD NOT FIX IT AND WOULDN'T PAY TO HAVE IT FIXED. THE CAR WILL RUN BUT ONLY WITH A WIRE RUNNING TO THE THE FUEL PUMP FROM THE BATTERY. WHEN THE CAR DOES RUN, IT SOMETIMES ACTS LIKE IT IS STARVING FOR FUEL. I SUSPECT A TIRED FUEL PUMP AND FAULTY RELAY. I HAVE PURCHASED A NEW FUEL PUMP. I HAVE A PARTS CAR FOR THIS ONE, A COMPLETE '72 280 SEL 4.5. I WOULD PULL THE FUEL PUMP RELAY OFF THAT CAR TO FIX THIS ONE IF I KNEW WHICH RELAY IT ACTUALLY WAS. I GUESS I COULD HAVE TAKEN THE FUEL PUMP ALSO, BUT I WANTED TO NOT HAVE TO DO THIS AGAIN IN MY LIFETIME. IS THERE A PLACE IN THE CD MANUAL WHERE IT GIVES THE LOCATIONS OF THE PARTS, IF SO WHERE IS IT LISTED? ANY HELP WOULD BE APPRECIATED. THANK YOU.