I know you said you have a 2021 Grom, but it should be vary similar.
Okay after a few days, I haven't got any reply. I will go ahead and post a guide here. Correct me if I'm wrong. For any one out there with the new bbk or replaced the throttle body. Here are the steps to reset your bike to adapt with the new toys. Tools: 2 paper clips. Step 1. Remember the...www.hondagrom.net
Yes it’s got a red cover over it. Also the manual states 2 different part numbers for the bridging plug. us and European I guess.Are you sure you found the correct plug? In the manual, it shows the plug only has 2 pin outs, thus the the wire colors doesn’t matter. Unless your UK/EU bike is somehow different than a US bike.