Does anyone make a single connector for the passenger side battery that is capable of connecting both positive battery cables to? I have been having nothing but trouble with the the GM "two connecters sandwiched together" solution. I would love to have a one piece connector that bolts to the battery and has a clamp for the the driver's side battery at 9 o'clock and one for the starter at 6 o'clock.

Does such a device exist?

Battery Warehouse has some good ones for $4 or $5.

The thing you told me about is a single connector? I'm sorry, I thought it was just a better stud for the original connectors...I'll check it out.

Battery Warehouse has some good ones for $4 or $5.
They said they only have them for top posts. I am still running side post batteries.

I really doubt you will find any. I ended up using these and am happy with them and they are made to be stackable: http://www.delcity.net/delcity/servlet/catalog?parentid=1009&page=1
I had them on my cables for about a year when my starter and batteries died and they still didn't have any corrosion.
Just use a bolt and nut to connect them. Screw the bolt all the way in and then tighten the nut down while holding the bolt with another wrench to keep it from going in too far. This way you can get it much tighter without stripping the lead battery threads and you have a place to connect jumper cables too.

Yeapper Run those and you can use a regular short bolt to connect to the battery. IF you decide to go top post there are alot more choices out there for what you want to do. Most came from the BIG diesel truck and work great.