Unscrewing the positive terminal in the engine bay - possible?

[DCintheUK]

Hello all,

Looking to hardwire my CTEK charger - and very well aware that due to the battery monitoring system on the G29 you need to use the engine bay points.

Been using crocodile clip connectors for a while - but want to run a permanent wire. The CTEK's come with a cable with small eyelets - which are perfect - providing I can find a way to connect the +'ve to the terminal post. Everything online suggests a "star" adapter is needed to unscrew the post - but it won't budge. I've been as close as I dare with a socket set - but I'm worried if I push more something will break.

So... can anyone else with a G29 confirm that the post does unscrew? It certainly looks like it does.

[DCintheUK]

Scratch that question - answered it myself. Having found the "Positive terminal nut" part online - I gave it a go with an impact driver - and it unscrewed without a problem! Leaving this here in the forum in case useful to others!

[davidprice]

Why does the battery monitoring system require it to be charged via the terminals under the bonnet?
Last winter I just connected my charger direct to the battery in the boot.

Have I done a bad thing?

[smorris_12]

The system (ideally) needs to see extra charge current go in so it can adjust its idea of the battery state otherwise it'll be more charged than it realises.