i dont think you would have gotten 4 nand dumps or an ecc file if it was bridged but i could be wrong you need to set the meter to ohms then put the leads together and you should get 0.4 or somewhere around that area. whatever you get is what you should expect to see when you test the solder joints and there is a bridge. i would try 2k ohms so if the two points have over 2000 ohm of resistance between them it might jump up a little but it should immediately fall back to 0 (out of range). i have the exact same console here without the nand r/w qsb on my desk i just measured the entire u1d1 header and on 2 points next to each other i got 27,000 ohms all the rest were 99k and above. it might be a little different with the qsb attached but they shouldn't be less than 9000 ohms. when you test 2 point always go back and recheck. when you are done set your meter to 20k or 200k then measure again to see how high they go. if it says 0.L or stays dead on 0 that means out of range. or infinite resistance (no solder bridge) if its 0.1 - 0.5 ohms then you have a dead short.
THE TOP SYMBOL IS A RESISTOR
THIS IS THE SYMBOL FOR OHMS
View attachment 26914 OHMS IS THE MEASURE OF RESISTANCE