Quoted from MrBally:If you're using LED's in the bumpers remove the sockets completely, tack solder wires to a 44/47 or 555 LED and run the wires through the bumper body & playfield and solder them to the PF wiring. Leave some slack but remember that since they are LED's, they shouldn't burn out in theory for many, many years.
Maybe place a glob of Silastic etc. in the bumper cavity to hold the LED in place.
If you use the direct solder method. make sure to use flexible stranded wire... it holds up better to the vibration. If their ever is a break, it will be where the solder has stiffened the wire at the solder joint. Leave enough slack to pull the bulb up for a repair in the future just in case that happens.
Tehachapi, CA
