What do you have to start with? I hope you have a 5-speed harness on the trans.
If you have a 5-speed harness 89-93 and you car is from those years as well, no splicing needs to be done. The Automatic trans harness will unplug and the 5-speed version will plug in it's place. Ditto if you have a '94/'95 harness and '94/'95 car. The connection (two connectors for a newer car) is just under the edge of the dash where the center console goes.
The only splicing that needs to be done is if you are using an older harness(89-93) in a newer car (94/95) or vice versa. If that is the case you have, I can help.