https://www.greatplainselectronics.com/ Looks like .156 size.

LTG : )™

It's a 0.100 right angle male header. I just did a rebuild of connectors and new header pin. My game had the original Idc connector wires cut, a terminal strip added and pigtail wires soldered direct to the pins on the single bank drop target opto board. I can send pictures when I get to my computer of the repair.

+1 for Chet he helped me with a nice hi-res photo (since his is currently on a rotisserie) I needed underneath the playfield when I was working on my whirlwind the other day.

Here are a couple of pictures of the wiring harness and molex connector i made for the drop target opto. I installed a new right angle 5-pin 0.100 header on the opto board (from Great Plains electronics), a new molex housing and trifurcon pins and made up a new wiring harness to connect the incoming four wires. Make sure you use the correct wire colors/pins on the molex connector on the board.

Pin 1 Black/Yellow (GRD)
Pin 2 Key
Pin 3 Gray/yellow
Pin 4 White/red
Pin 5 Green/yellow

Note; I double crimped the wires on the on one side of the 4 wire molex connector. The original wires were connected to the drop target opto board using a "through" IDC.

WW single bank drop target Opto Board connector.jpg

WW single bank drop target Opto Board connector harness.jpg

All parts are from Great plains, by selecting off of this page on the web site, for .1" header pins and connectors, The plug for the harness are 0.093" also selected from the same page.

https://www.greatplainselectronics.com/categories.asp?cat=35

i will send you part numbers tonight..

Molex connectors and pins I used:

Part Number 22-05-3051 Connector, 0.1" Header, 5 pin, right Angle (1 each)
Part Number 08-52-0123 Crimp contact, 0.1" (4 each) (suggest buying extra )
Part Number 22-01-2057 Connector, 0.1" Plug, 5 pin (1 each)
Part Number 03-09-1042 Connector Receptacle, 4 pin, 0.093" (1 each)
Part Number 02-09-2118 Crimp contact, 0.093" pin (4 each) (suggest buying extra)
Part Number 02-09-119 Crimp contact, 0.093" socket (4 each) (suggest buying extra)
Part Number 03-09-2042 Connector Plug, 4 pin, 0.093" (1 each)

You will need some short lengths of colored 22 gage stranded wire, I used red, green, black, and white/yellow that I had on hand. (see photo)

Recommend buying extra crimp pins, sockets, as noted above.
You will need a molex pin crimper if you don't already have one to make the wire crimps.

be careful when desoldering the existing 5 pin 0.1" header from the opto board. the traces are quite delicate. I would desolder the 4 wires from the header pins first, one at a time, then carefully cut the plastic off the board using small (sharp) side cutters by cutting a little away with each cut. That will make it much easier to desolder the pins from the small board. Heat each pin, one at a time from the solder side and using a small set of needle nose pliers or forceps, gently tug on the long side of the pin, the pins will usually just fall out. You will need to clear the holes of solder once the pins are removed using a solder sucker in order to install the new 5-pin header. The other option is to just replace the board. Tony Clark at Great Lakes Modular makes a replacement single bank drop target opto board for Whirlwind that is not too expensive.

This was a big help thank you