Anyone have a wiring diagram or know how to hook this up ?

Black and red are pretty standard for negative & positive battery terminals.
There is likely a model number (pic isn't good enough to see the finer print) on the label but the larger numerals are probably serial numbers and without the model number, you may have a problem finding the exact installation info you want.

The link below has illustrations for a different model but manufacturers will generally stick with a wiring code to make installation and even production simpler:

http://www.mygen.com/users/dbruce/myz31/Jacobs%20Ultra%20Team%20Installation%20Instructions.pdf

That company does not have the web 'presence' they should have by now.

As close as you are gonna get,yours is old, http://www.jegs.com/InstallationInstructions/500/566/566-342000.pdf

http://www.mygen.com/users/dbruce/myz31/Jacobs%20Ultra%20Team%20Installation%20Instructions.pdf

1. Basic Connection Kit Schematic
   • 1Connect the two heavy 12 gauge red and black wires directly to the 12-volt battery terminals: Red to the positive (+) terminal, black to the negative (-) terminal.
   • 2 Connect the smaller gauge red wire to one terminal of the supplied terminal block. Wire its corresponding terminal to the ignition switch at the positive terminal on the switch where the OEM factory ignition coil wire was previously connected.
     
   • 3 Connect the green wire to the other terminal of the supplied terminal strip. Wire its corresponding terminal to the ignition module at the negative terminal where the OEM factory ignition coil wire previously connected to the module.
     
   • 4 Connect the smaller gauge black wire to the negative terminal of a CD compatible ignition coil.
     
   • 5 Connect the white wire to the positive terminal of a CD compatible ignition coil.
     
   • 6 Tape off the ends of the orange and purple wires not used in basic connection.
     
   • 7 Connect the brown wire to an optional aftermarket tachometer. If one is not used, tape off the end of the wire to prevent grounding.
     
   Adjusting And Configuring The Rev Limiter
   • 1 Adjust the rev limiter by turning the rotary switches on the Energy Pak unit base plate to the proper setting using a small flat-head screwdriver. The rev limiter is shipped in the off position (both rotary switches turned to 0). The left rotary switch (closest to the large wire hole) represents 1000 RPMs. The right switch (next to the smaller wire hole) represent 100 RPMS. Set the 1000 switch to 7 and the 100 switch to 5 for an example rev limit of 7500 RPM.
     
   • 2 Cut one or both of the black and white tracer wire loops located on the end plate of the Energy Pak to configure the rev limiter for use on either four- or six-cylinder engines. For four-cylinder operation, cut both loops in half. Cut either loop in half for six-cylinder operation. For eight-cylinder engines, leave both loops intact.
     
   • 3 Tape off the ends of any cut tracer wire loops to prevent them from shorting with each other or grounding.
     

• Do not use with a stock OEM ignition coil. The Jacobs Energy Pak requires an upgrade to a CD compatible ignition coil before installation. Jacobs offers these coils as a separate kit or they may be purchased from other aftermarket sources.