Cash injection for building maintenance

Yes.

Spend Money, allocating to the appropriate account. Depending on local tax law, this may be an expense account. Or it may have to be to a fixed asset, recovering the investment over time through depreciation.

Spend Money, allocating to your capital account. This is a draw.

Since you are a sole trader, you might be interested in a simpler way of handling equity. If you’re already well along using a capital account, it will be easier to stick with it. But if you are just starting in Manager, consider this Guide: