"So jumping 4 and 6 will basically do the same job as the relay?"

Yes, most of the time. It depends on which of the TWO relays inside that white cover is failing. Besides the "pump" relay, there is a "system" relay that seldom fails, but when it does, the FI system is totally dead.*
(Aside to Onkel Odo: There is no component diagram on the white plastic LH relay case.
But the terminals to connect to force the pump ON are 30 and 87-2.)

Here's an alternative to paper clip fuse jumpering: Get a spare relay and force the pump relay contacts closed with a short piece of rubber hose. (See pic below). Then simply plug in that relay in place of the suspected one.
NOTE: If the pump is good, it will run as soon as the "rigged" relay is plugged in.

Fuel Pump relay contacts held closed by short piece of hose...


* A 3-legged "Y" jumper will bypass both pump and system relays. Power (30) is wired to pump (87-2) and System (87-1) to power ECU, AMM, Injectors, etc. Adding an inline ON/OFF switch to the +12V terminal 30 wire leg will allow the pump to be temporarily controlled as needed.
NOTE: This jumper should ONLY be used as a temporary fix, as it nullifies the built-in Bosch FI Safety shut-down in case of an accident.


--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.