The floodlight and security camera take the same “slot” - the “on the roof” slot, which is still available with the windshield, so yes, you could put a floodlight, a security camera, a funnel, a solar panel, or a turret - OR being the operative word (as those all take the same “slot”).
Also, you can still add slotless things, like car/truck/motorcycle battery, clock, tracking device, etc., and you can put in a “tank” slot - gas/water/dirty water/diesel/napalm/hydrogen tank OR any size storage battery.