Fixed it myself, you should edit the file, just replace it all with:
fusion_generator = data.raw["fusion-generator"]["fusion-generator"]
fusion_generator.input_fluid_box.pipe_connections = {
{ flow_direction="input-output", direction = defines.direction.south, position = {-1, 2}, connection_category = {"fusion-reactor", "fusion-generator"} },
{ flow_direction="input-output", direction = defines.direction.south, position = { 1, 2}, connection_category = {"fusion-reactor", "fusion-generator"} },
{ flow_direction="input-output", direction = defines.direction.north, position = { 0, -2}, connection_category = {"fusion-generator"} },
{ flow_direction="input-output", direction = defines.direction.west, position = {-1, 0}, connection_category = {"fusion-generator"} },
{ flow_direction="input-output", direction = defines.direction.east, position = { 1, 0}, connection_category = {"fusion-generator"} },
{ flow_direction="input-output", direction = defines.direction.west, position = {-1, -1}, connection_category = {"fusion-generator"} },
{ flow_direction="input-output", direction = defines.direction.east, position = { 1, -1}, connection_category = {"fusion-generator"} },
}
And all will be fine. Regards!
