The click is definitely coming from your motors trying to engage. Or it can be your power prongs shorting out. Make you get your drone looked at so you know its safe to fly
Don't buy parts from aliexpress. I bought a gps from the and IT DIDNT WORK. Try looking for official DJI products and official resellers. I got mine done at a local shop called Vision Up Canada. They sold me a gimbal for $215 for my Mavic. Check them out