My grapple is http://www.everythingattachments.com/Compact-Tractor-Root-Grapple-p/eta-cut-sl-rg-50.htm and I asked Messick's to set up the connectors in the following way:
"Could you have the guys attach one male and one female coupler 1/2 inch Pioneer #s 8010-4 and 4050-4. Thanks "
Here are a couple of pictures.
One of the connectors had a drip, drip, drip, leak. I tried snugging it up and using a plumbers putty to no avail. Messick's was quick to promise a replacement. I couldn't be happier with their service!