Welcome to TRS
Inside the cab, up above the new clutch pedal you should see a 6 pin thin connector, its plugged into the Clutch bypass harness used for automatics
Unplug the 2 connectors
The one connector will plug into the Clutch pedal safety switch, seen here:
https://www.2carpros.com/forum/automotive_pictures/62217_CPP_1.jpg
And here:
https://images-na.ssl-images-amazon.com/images/I/31DPq6ihEsL._SR600,315_PIWhiteStrip,BottomLeft,0,35_SCLZZZZZZZ_FMpng_BG255,255,255.jpg
Connector wiring seen here:
https://cimg8.ibsrv.net/gimg/www.ford-trucks.com-vbulletin/492x555/clutchswitchconnections_fc3ef66f2c06a4fa57e362ac531408d08a29a5ab.gif
There are 3 switches inside, each 2 wires are on one of the switches, i.e. 1/2, 3/4, 5/6
The last 2 wires on the connector, 5 and 6, are the START wires, usually pink or red/blue stripe
When these 2 wires are connected together that would bypass the safety switch
That was done here:
https://www.explorerforum.com/forums/attachments/my08-007-jpg.17294/
But if you have the working clutch switch then pressing the pedal down all the way connects those 2 wires in the switch
The computer has no connection to starter motor activation, just FYI
But automatic computer in a manual vehicle may have a higher idle or wandering idle, and it would turn on the CEL(check engine light) full time, if you have one