manual lockup on 700r4?

[creamsicle68]

hey guys i have a truck that caught fire and all the wires got melted. i got the truck to were it srunning now, but the trans has 3 wires coming up and i was told they are for the lockup converter? also i was told there is a kit you can get to make the lockup go to a switch on the dash and you can manually engage it? can any of this be varified and if so could i get pointed in the right direction to get that manual lockup?

Thanks, Dalton