According to the picture the CFG1 pad isn't bridged. Only CFG6/Enable is bridged.
If you have to solder the wire too, depends on the mainboard.
Ramps for example has a pull down resistor on MS1 and without the jumpers in place, CFG1 is automatically grounded. But it won't harm if you do the wire hack.
Except you have a Ramps board where the jumper pins are connected underneath!
Then you'd make a shortcut with the wire, so beep it through before firing it up.
If you have to solder the wire too, depends on the mainboard.
Ramps for example has a pull down resistor on MS1 and without the jumpers in place, CFG1 is automatically grounded. But it won't harm if you do the wire hack.
Except you have a Ramps board where the jumper pins are connected underneath!
Then you'd make a shortcut with the wire, so beep it through before firing it up.