[anyheck]

Perhaps a Bayonet - type of mounting where your robot has a delivery system,
eg a 1" square tube with a right angle end that actuates out, you can then provide a female connector to a partner team to mount on their mini-bot and make it compatible.

Bad thing is probably the need for re-inspection of the mini-bot in this case if it's done on-the-fly.

Ideally your mini-bot could be launched electrically using a Digital input or closed switch arrangement or have its own internal detection of pole contact.

Nothing says you have to make arrangements for the bot deployment at the competition, you could agree with some partner teams locally to create a regional standard.

Teams can build their bots to intentionally be traded off at the regional for the additional points any time it scores.

That's co-oper-tastic.