Soviet BT-5 question

[MikeN]

Im making the turet for my BT-5 and I feel there should be some sort of handle or knob to enable the crew to open the 2 top hatches and rear hatch so they can get in.
There are lots of pictures of preserved machines online but none of them seem to show anything. Some show a hexagon bolt which i think has been put there to fill a hole.
Without a handle the crew would either need a screwdriver or very strong fingernails to prise open the flush fitting lids.
Anyone know?
Thanks, Mike

[Kaczor]

Good question. In archive photos, kits, and 3D models (War Thunder game), only some rivets or bolts appear.

[Pavel]

To open the hatch, effort was required! A key-hook was inserted into the hole of the lock and the lid opened, it was locked from the inside, it was impossible to open the hatch without heavy tools. The crews died inside, but did not give up!
https://tankist-31.livejournal.com/15966.html
Inside there is a locking lever that is turned through the hole and opens the hatch.

[MikeN]

Great!
Thanks for the replies.
Very useful link with pictures Pavel.
So no handle.
I think I will add a hexagon head screw and leave it at that.
I've learnt that there's no such thing as a standard BT-5. There are different wheels , tracks , exhaust pipes, Arrangement of turret top fittings, with or without radio antenna, lifting eyes . Any combination of the above could be correct .