how to close filled orders correctly


I have started to work with testnet API .

I read already some threads about closing orders but I cannot make it work for me.

my scenario
I have opened few BUY Market orders using /api/v3/order

one example
params = {
‘symbol’: ‘BTCUSDT’,
‘side’: ‘BUY’,
‘type’: ‘MARKET’,
‘quantity’: ‘0.1’,

{‘symbol’: ‘BTCUSDT’, ‘orderId’: 6736801, ‘orderListId’: -1, ‘clientOrderId’: ‘CFnCqUbqfLpC3YrvLR13qU’, ‘transactTime’: 1708788892618, ‘price’: ‘0.00000000’, ‘origQty’: ‘0.10000000’, ‘executedQty’: ‘0.10000000’, ‘cummulativeQuoteQty’: ‘5113.15474110’, ‘status’: ‘FILLED’, ‘timeInForce’: ‘GTC’, ‘type’: ‘MARKET’, ‘side’: ‘BUY’, ‘workingTime’: 1708788892618,
‘fills’: [{‘price’: ‘51129.23000000’, ‘qty’: ‘0.00802000’, ‘commission’: ‘0.00000000’, ‘commissionAsset’: ‘BTC’, ‘tradeId’: 1329128}, …
‘selfTradePreventionMode’: ‘EXPIRE_MAKER’}

I get use GET myTrades API

[{‘symbol’: ‘BTCUSDT’, ‘id’: 1329128, ‘orderId’: 6736801, ‘orderListId’: -1, ‘price’: ‘51129.23000000’, ‘qty’: ‘0.00802000’, ‘quoteQty’: ‘410.05642460’, ‘commission’: ‘0.00000000’, ‘commissionAsset’: ‘BTC’, ‘time’: 1708788892618, ‘isBuyer’: True, ‘isMaker’: False, ‘isBestMatch’: True},
{‘symbol’: ‘BTCUSDT’, ‘id’: 13291

but HOW I suppose to close this position ?

what I understood that - it should be API order call with side SELL …
but this endpoint does not have an option to specify orderID to be closed

assuming I have more than 1 position opened … how to specify this action properly ?
what I am missing on API doc ?
looking forward to hearing from you

The order you made has been FILLED, as indicated by the output. Could you clarify what you mean by ‘closing this position’?
If you intend to close a position, note that you cannot buy a specific orderID. Instead, you’ll need to create a new order with the opposite direction and the same quantity as your open position.