The Participant Guide offers more general information about the use of Mindforce.

How can I use a Mindforce Chip?
To successfully use Mindforce, you need three components, which are; an NEOPSION IMPLANT, a Mindforce POWER CHIP and MIND ESSENCE. To be able to insert the implant, you also need a PAYN-INC IMPLANT INSERTER, which can be bought from the TRADE TERMINALS. Once you have inserted the NEOPSION IMPLANT, you may drag the Mindforce POWER CHIP to into the PAYN-INC IMPLANT INSERTER panel press insert to have it installed.

To use the MindForce ability you must first map the particular POWER CHIP to your KEYBOARD MAP (see the Movement & Interaction Guide) by dragging it from your INVENTORY to the KEYBOARD MAP. Once mapped to a key, pressing that key will initiate the particular MindForce ability.

I inserted a NEOPSION IMPLANT and now I can't find it.
When you have inserted an implant with the implant tool, you won't be able to see it as it is now inside your avatar. You can now use mindforce chips by mapping the POWER CHIP to a key on your KEYBOARD MAP (see the Movement & Interaction Guide) and then using that key to use the MindForce ability. To remove the implant, just use the implant tool again.